Proportion Word 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 set up a proportion to solve a word problem?

Back

Identify the two ratios involved in the problem and set them equal to each other.

Tags

CCSS.7.RP.A.3

Front

What is the cross-multiplication method?

Back

Cross-multiplication is a method used to solve proportions by multiplying the numerator of one ratio by the denominator of the other ratio.

Tags

CCSS.7.RP.A.3

Front

If 4 out of 10 students like a game, how do you find out how many like it in a larger group?

Back

Use the ratio 4/10 and set it equal to x/total number of students, then solve for x.

Tags

CCSS.7.RP.A.3

Front

What is the formula for finding the total cost based on a per person cost?

Back

Total Cost = Cost per Person × Number of People.

Tags

CCSS.7.RP.A.2C

Front

How do you estimate a number based on a sample?

Back

Use the ratio of the sample to the total population to estimate the number in the larger group.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Front

What is the relationship between weight and quantity in a proportion problem?

Back

Weight can be found by setting up a ratio of weight to quantity and using it to find the weight of a different quantity.

Front

How do you find the number of items wrapped if you know the tape used per item?

Back

Set up a proportion using the tape used for a known number of items to find the unknown number.

Tags

CCSS.7.RP.A.2C

Front

What is the importance of understanding ratios in real-life situations?

Back

Ratios help compare quantities and make decisions based on proportional relationships.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How can you use proportions to solve for an unknown variable?

Back

By setting up a proportion and cross-multiplying to isolate the variable.

Tags

CCSS.7.RP.A.2C