Proportion Story Problems

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Tags

CCSS.7.RP.A.2A

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the two ratios and set the products equal to each other.

Tags

CCSS.7.RP.A.3

Front

What is the formula for finding a missing value in a proportion?

Back

If a/b = c/d, then ad = bc. You can find the missing value by rearranging this equation.

Tags

CCSS.7.RP.A.2C

Front

What does it mean for two ratios to be proportional?

Back

Two ratios are proportional if they represent the same relationship or if they can be simplified to the same fraction.

Tags

CCSS.7.RP.A.2A

Front

If 150 people take 20 minutes to wait, how long will 240 people take?

Back

32 minutes.

Tags

CCSS.6.RP.A.3B

Front

If 13 out of 20 homes have a computer, how many computers are expected in 60 homes?

Back

39 computers.

Tags

CCSS.6.RP.A.3B

Front

How do you convert a ratio to a fraction?

Back

To convert a ratio to a fraction, write the first number as the numerator and the second number as the denominator.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions show that two ratios are equal.

Tags

CCSS.6.RP.A.3A

Front

If one centimeter on a map represents 25 kilometers, how many kilometers does 7 centimeters represent?

Back

175 kilometers.

Tags

CCSS.6.RP.A.3B

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2