#2.21 - 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

What is the scale factor in a scale model?

Back

The scale factor is the ratio of the model's dimensions to the actual dimensions.

Front

If a model is built at a scale of 1:10, what does this mean?

Back

It means that 1 unit on the model represents 10 units in real life.

Front

How do you convert feet to inches?

Back

Multiply the number of feet by 12, since there are 12 inches in a foot.

Front

What is the formula to find the total cost per item when given a bulk price?

Back

Total cost per item = Total price / Number of items.

Front

If the ratio of sugar to flour is 1:5, how much sugar is needed for 50 cups of flour?

Back

10 cups of sugar (1/5 of 50).

Front

How do you find the unit rate from a ratio?

Back

Divide both terms of the ratio by the same number to find the rate per one unit.

Front

What is the relationship between time and speed in a typing problem?

Back

Speed = Distance (words) / Time (seconds).

Front

If a 12-ounce bottle lasts 16 weeks, how do you find the duration for an 18-ounce bottle?

Back

Use the ratio of ounces to weeks: (18/12) * 16 weeks = 24 weeks.