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proportions

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Ratios and proportions 2017-08-01
From khurram:
what is ratio and proportion? please give a detailed note on this topic, i am really panic of these calculations
Answered by Penny Nom.
4 carpenters can build 8 houses in 10 days. 2016-04-05
From Kenneth:
Hello:

Here is my question:

4 carpenters can build 8 houses in 10 days. 2 carpenters can build how many houses in 15 days?

Here is one solution:

The number of houses built is jointly proportional to the number of carpenters and the number of days. So h = kcd where k is a constant. Substituting the given: 8 = k*40, so k = 1/5. Our formula is then h = cd/5. I'm not sure how to determine whether or not one unit is jointly proportional to any other unit.

However, if 2 carpenters are unknown as in 4 carpenters can build 8 houses in 10 days. How many carpenters can build 6 houses in 15 days? What is the solution using this method? And likewise, if days are unknown, as in 4 carpenters can build 8 houses in 10 days. 2 carpenters can build 6 houses in how many days?

I thank you for your assistance.

Answered by Penny Nom.
Proportional rates 2013-10-10
From Varsha:
A province's Ministry of Social services has found that both the number of people needing social assistance and the province's total expenditures on social assistance are proportional to the rate of unemployment. Last August when the provincial unemployment rate was 8.4 %, the province provided assistance to 89,300 individuals at a total cost of 4107.4 million. The forecast unemployment rate for next August is 7.9%. How many people can the province expect to need social assistance next August? What amount should the province budget for social assistance in August?
Answered by Penny Nom.
18/y=30/25 what number does y represent 2013-07-20
From celeste:
18/y=30/25 what number does y represent
Answered by Penny Nom.
Sharing in a car rental 2013-04-09
From Marilyn:
8 persons are planning to share equally the cost of a rental car. If 1 person withdraws from the arrangement and the others share equally the entire cost of the car, then the share of each of the remaining persons is increased by--------------?
Answered by Penny Nom.
If 4 cooks can bake 8 pies in 6 hours????? 2013-03-18
From Kenneth:
Hello:

I want to determine which quantities are directly and inversely proportional in order to determine the answer for the following:.

If 4 cooks can bake 8 pies in 6 hours, 2 cooks can bake how many pies in 4 hours?

Answer: 2 2/3 pies

Can someone fully explain what I need to know in order to determine what is directly and inversely proportional in the example above?

I thank you for your reply.

Answered by Robert Dawson.
The dimensions of a rectangle are in the ratio 5:3 2013-03-08
From SM:
4. The dimensions of a rectangle are in the ratio 5:3. If the longer side is 18 cm,

a) What is the length of the shorter side?

b) What is the area of the rectangle?

Answered by Penny Nom.
Fractions and proportions 2012-02-16
From Kenneth:
Hello:

I read the following in an old textbook:

Display the numbers 27, 18, 26, and 39 so as to form a proportion.

Which set of equal fractions is correct?

18/27 = 26/39

18/26 = 27/39

I thank you for your reply.

Answered by Penny Nom.
Four carpenters can build eight houses in 10 days. 2011-11-23
From Kenneth:
Four carpenters can build eight houses in 10 days. Two carpenters can build how many houses in 15 days?
Answered by Penny Nom.
Dividing the profits 2011-04-19
From Tracy:
I need to know how to come up with the answers to the following problems. I need to be able to show my work. So can you help me on how to come up with the answers to questions like these. Thanks.

Three individuals form a partnership and agree to divide the profits equally. X invests $9,000, Y invests $7,000, Z invests $4,000. If the profits are $4,800, how much less does x receive compared to having the profits divided in proportion to the amounts invested by X, Y, and Z?

In printing an article of 48,000 words, a printer decides to use two sizes of type. Using the larger type, a printed page contains 1,800 words. Using a smaller type, a page contains 2,400 words. The article is allotted 21 full pages in a magazine. How many pages must be in smaller type? ___________

thank you

Answered by Penny Nom.
Who is more extravagant? 2010-06-01
From likhitha:
kunal and ramit have Rs.40 and Rs.50 respectively. Kunal spends Rs.18 and ramit spends Rs.21.Who is more extravagant ?
Answered by Penny Nom.
Ratios and proportions with mixed units 2010-05-13
From Kenneth:
Is it incorrect to have a proportion with numbers containing units that are not the same on both sides of the equal sign?

Here is an example: $0.07/$1.00 = ?/$0.89 is okay, but if I add a different unit (20 ounces) to one side of the equal sign but not the same unit to the other, is the proportion incorrect?

$0.07/$1.00 = ?/$0.89/20 ounces.

In order to determine the missing amount, the calculation becomes ($0.07/$1.00)/$0.89/20 ounces = $?, but is this proportion correct with the units as they are? Two dollar-units cancel leaving dollar/ounces equals $?/ounces, but is this correct?

Answered by Robert Dawson.
If 2 is to 55, then 6 is to ? 2010-03-04
From patty:
Example,
If 2 is to 55, then 6 is to ? How do I begin to figure this out, is is an algebra formula?

Answered by Penny Nom.
Ratios, proportions and medicine 2006-10-25
From Steven:
I don't understand why we need to learn about ratios and proportions because i want to become a doctor and i don't know if i'll ever use this type of math.
Answered by Penny Nom, Claude Tardif and Walter Whiteley.
Jobs relating to the topics of ratios and proportions 2005-05-17
From Alexa:
What are some jobs relating to the topics of ratios and proportions other than architects and map makers?
Answered by Walter Whiteley.
Ratios and rates 2004-10-27
From Kenneth:
What is the difference between a ratio and a rate?
Answered by Penny Nom.
Some ratio problems 2004-03-13
From Hossen:

1) After James spent 2/5 of his pocket money on magazines, and 1/4 of his pocket money at a football match, he had 1.75 left. How much pcket money did he have in the beginning?

2) A joint of Lamb costs 5.95 per/kg. The price per kilogram is reduced. A joint weighing 1.2kg is reduced by 50p.

A) What is the reduced price per kilogram?

c

Answered by Penny Nom.
Ratios and proportions 2003-12-31
From Frank:
I would like to know how you use 'ratios and proportions' in everyday life.
Answered by Penny Nom.
Knitting gauge and felting 2003-10-27
From Sara:

I wish to create a pattern to knit an item that will then be felted, thus, shrink as a result. In order to determine the proper gauge to use in creating the item, I produced a gauge swatch, noted the original properties and then the post-felting properties. They are as follow:

Before Felting:

20 stitches(width) x 20 rows(height)yielded:
Gauge: 3.2 stitches(width) and 4 rows(height) = 1"
Dimensions: 6.25"(width) x 5.25"(height)

After Felting:

20 stitches(width) x 20 rows(height)
Dimensions: 4"(width) x 3"(height)

How do I calculate the percentage change in size to accurately determine the number of stitches and rows needed to produce the desired dimensions for the finished (felted) item?


Answered by Penny Nom.
Monthly rent 2002-09-04
From Al:
How do you figure monthly rent if the charge is 11.00 per sq. ft. and there are 1,000 sq. feet?
Answered by Leeanne Boehm.
20 men dig 40 holes in 60 days 2002-07-24
From Lindsey:
20 men dig 40 holes in 60 days. So, 10 men can dig 10 holes in how many days?
Answered by Penny Nom.
Ratios 2002-04-17
From A student:
  1. Medication is givin at 1cc. per 20 pounds of body weight. A dog weighs 16 pounds how many ccs. of medication does the dog get?

  2. Dr. Lee wants you to prepare 1000 ml. of a 10% dextrose solution in lactaed ringers for diuresis or a patient you have a 1 L bag of lactated ringers and 500 ml of 50% dextrose for injection. How would you prpare the solution?

Answered by Penny Nom.
Ratios and proportions 2001-11-26
From Adam:
I am doing a project where I come to this website and ask a math expert about a certain topic. My topic is ratios and proportions. Can you please tell me what your job is and how you use ratio's and proportions in your job. Can you also please explain what ratios and proportions are.
Answered by Harley Weston.
Ratio and proportion 2001-10-10
From Steve:
Where would you use a proportion and/or a ratio in a real life job or problem.
Answered by Leeanne Boehm and Walter Whiteley.
Ratios 2001-02-20
From Louise:
there are 3 people and they decide to share their tips (working in a restaurant) ann gets 180 tony 130 peter 90 total amount is 36 what share should they get.
Answered by Penny Nom.
Working together on a job 2000-10-23
From Nicole:
WORKING TOGETHER ON A JOB: Patrice, by himself can paint 4 rooms in 10 hours. If he hires April to help they can do the same job together in 6 hours. If he lets April work alone , how long will it take her to paint 4 rooms?
Answered by Claude Tardif.
Making milkshakes 2000-09-04
From Linda:
To make a chocolate milkshake, 3 parts chocolate syrup are mixed with 2 parts malt. To make a vanilla milkshake, 2 parts vanilla syrup are mixed with 1 part malt. If equal parts chocolate and vanilla milkshakes are mixed, what is the proportion of malt to milkshake?
Answered by Penny Nom.
Six typists 2000-08-19
From Paula Duncan:
If it takes a typist 4.5 hours to type 860 words, how many hours would it take 6 typist to do 16800 words?
Answered by Penny Nom.
Ratios 2000-01-11
From Cyndi:

My name is Cyndi and i am in middle school in the 8th grade. The questions i am about to ask come from my book. My return address is PR_Angel1@yahoo.com

The directions on a can of lemonade mix say to use 8 tablespoons of mix to make 2 quarts of lemonade. Heathcliff wants to make 7 quarts of lemonade. How many tablespoons of mix should he use? and In a recent year, the ratio of men to women in the United States armed forces were about 9 to 1
  1. if there are 90 men in a random group of military personnel, how many women would you expect to find in the group?
  2. in a group of 90 military personnel, how many of them would you expect to be women?
  3. what percent of armed forces personnel were women in that year?

Answered by Penny Nom.
Ratios and proportions 1999-11-19
From Rebecca:
I'm not that good of a student and I was woundering if there is a shortcut to ratios and proportion. My 6th grade teach tought all we needed to know. I was just wounder if there was an easier way.
Answered by Claude Tardif and Harley Weston.
Ratios. 1997-11-26
From Jennifer Kim:
I am a grade 12 math student who would like to know if there is an easy way to solve

In a school the ratio of the number of Grade 11 students to the number of grade 12 students is 4:3. If there were 5 fewer students in grade 11 and 3 more students in grade 12, the ratio would be 7:6. How many students in each grade?
Answered by Penny Nom.

 
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