Understanding Proportions and Cross Products

The video tutorial explains proportions, where two ratios or fractions are set equal. It identifies terms in a proportion as columns, with specific terms called extremes and means. The product of extremes and means are equal, known as cross products. This property helps solve proportions with missing terms by determining cross products.

What is formed when two ratios or fractions are set equal to each other?

• A product

• A difference

• A sum

• A proportion

In a proportion, what is the term for the first and fourth positions?

• Extremes

• Averages

• Means

• Medians

What is the product of the extremes in the given proportion?

• 108

• 96

• 72

• 54

What is the product of the means in the given proportion?

• 108

• 96

• 72

• 54

What is the key property of a proportion regarding the products of extremes and means?

• They are equal

• They are always different

• They are undefined

• They are both zero

What are the products of the extremes and means often referred to as?

• Direct products

• Cross products

• Parallel products

• Inverse products

How can you solve for a missing term in a proportion?

• By subtracting the means from the extremes

• By adding all terms

• By determining the cross products

• By dividing the extremes by the means