Understanding Ratios and Proportions

The video tutorial introduces the concept of proportion, starting with a review of ratios and equivalent ratios. It explains what a proportion is, using examples to illustrate the concept. The tutorial then demonstrates the cross multiplication method to determine if ratios are proportional and solve proportions with missing terms. The lesson concludes with practical examples to reinforce understanding.

What is the ratio of the train to donuts in the example given?

• 1:1

• 1:2

• 2:1

• 2:3

How can you express the ratio 1:2 in fraction form?

• 1/3

• 1/2

• 2/3

• 2/1

What is the equivalent ratio of 1:2 when multiplied by 2?

• 3:6

• 5:10

• 2:4

• 4:8

What is the greatest common factor of 3 and 6?

• 6

• 2

• 3

• 1

What does a proportion represent?

• A difference between two ratios

• A statement of equality between two ratios

• A product of two ratios

• A sum of two ratios

In a proportion, what are the numbers inside called?

• Means

• Factors

• Multiples

• Extremes

What is the product of the means in the example 1:3 and 3:9?

• 12

• 15

• 9

• 6

Are the ratios 1:2 and 3:4 proportional?

• No

• Cannot be determined

• Yes

• Sometimes

What method is used to determine if two ratios are proportional?

• Division

• Cross multiplication

• Subtraction

• Addition

What is the result of cross multiplying 6:1 and 2:3?

• 18

• 12

• 24

• 6