Proportions Word Problems

Front

What is a proportion?

Back

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. Set them equal to each other to form a proportion.

Tags

CCSS.7.RP.A.2C

Front

What is the cross-multiplication method?

Back

Tags

CCSS.7.RP.A.2B

Front

How do you find an unknown in a proportion?

Back

To find an unknown in a proportion, set up the proportion and use cross-multiplication to solve for the unknown variable.

Tags

CCSS.7.RP.A.2C

Front

What is the exchange rate in a word problem?

Back

The exchange rate is the value of one currency in relation to another. For example, if the exchange rate is 3 Dinars for every $4, it means 3 Dinars can be exchanged for $4.

Tags

CCSS.6.RP.A.3B

Front

How do you solve a proportion involving currency exchange?

Back

Set up the proportion using the exchange rate, then cross-multiply to find the unknown amount.

Tags

CCSS.7.RP.A.3

Front

What is the formula for finding the new height when enlarging a painting?

Back

Tags

CCSS.7.RP.A.3

Front

How do you determine how many items you can buy with a certain amount of money?

Back

Set up a proportion comparing the number of items to the cost, then solve for the unknown number of items.

Tags

CCSS.7.RP.A.3

Front

What is the formula to find the time taken to read a book based on pages read per hour?

Back

Tags

CCSS.7.RP.A.3

Front

How do you round to the nearest hour in a word problem?

Back

If the calculated time is 4.5 hours or more, round up to the next hour. If it is less than 4.5 hours, round down.

Tags

CCSS.7.EE.B.3