Proportions Word Problems Review

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

Tags

CCSS.7.RP.A.2A

Front

How do you set up a proportion for a word problem?

Back

Identify the two ratios that are being compared in the problem. Write them as fractions and set them equal to each other.

Tags

CCSS.7.RP.A.2C

Front

What is the cross-multiplication method in solving proportions?

Back

Cross-multiplication involves multiplying the numerator of one fraction by the denominator of the other fraction. For example, if a/b = c/d, then ad = bc.

Tags

CCSS.7.RP.A.3

Front

If 1 dollar equals 6 Pounds, how would you express this as a proportion?

Back

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

Back

Cross-multiply to get 132 * 1 = 6 * x, then solve for x.

Tags

CCSS.7.RP.A.3

Front

What is the first step in solving a word problem involving proportions?

Back

Read the problem carefully to identify the quantities involved and determine the relationship between them.

Tags

CCSS.7.RP.A.3

Front

How do you convert a word problem into a mathematical equation?

Back

Translate the words into numbers and symbols, identifying the variables and constants involved.

Tags

CCSS.HSF.LE.B.5

Front

If you can buy 4 bunches of grapes for $10, how would you express this as a proportion?

Back

Tags

CCSS.7.RP.A.2A

Front

Back

Cross-multiply to find x: 4 * 25 = 10 * x, so x = 10.

Tags

CCSS.7.RP.A.2C

Front

How do you determine the total cost of multiple items using proportions?

Back

Set up a proportion comparing the cost of one item to the total cost of multiple items.

Tags

CCSS.7.RP.A.3