7.1.1 Ratio and Proportion Flashcards
1
Q
ratio
A
compares two numbers by division.
2
Q
proportion
A
an equation stating that two ratios are equal.
3
Q
extremes
A
in the proportion , the values a and d
4
Q
means
A
The values b and c
5
Q
cross products
A
The product of the extremes and the product of the means
6
Q
Cross Products Property
A
In a proportion, if a/b = c/d and b and d ≠ 0, then ad = bc.
7
Q
Properties of Proportions
A
The proportion a/b = c/d is equivalent to the following:
ad = bc b/a = d/c a/c = b/d
