Proportion Word Problems

Front

What is a proportion?

Back

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

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.

Front

If 3 pounds of granola cost $3.75, how much does 1 pound cost?

Back

$1.25 per pound.

Front

If Angel types 15 words in 10 seconds, how many words does he type in 1 second?

Back

1.5 words per second.

Front

What is the formula to find the total time taken if you know the rate and the total words?

Back

Total time = Total words / Rate.

Front

If a 12-ounce bottle lasts 16 weeks, how long will an 18-ounce bottle last?

Back

24 weeks.

Front

What is the scale factor in a model?

Back

The scale factor is the ratio of a length in the model to the corresponding length in the actual object.

Front

If a model car is 3 inches wide and the actual car is 4 feet wide, what is the scale factor?

Back

1:16.

Front

How do you find the new width of a triangle when it is enlarged?

Back

Use the scale factor to multiply the original width.

Front

If a triangle is 4 inches tall and is enlarged to 8 inches, what is the new width if the original width is 3 inches?

Back

6 inches.