Name:____________________________________________________ Block:_____ Date:_______________________ MATH 6/7 NOTES & PRACTICE
Unit 9 Notes: Proportions
A proportion is an equation stating that two ratios (fractions) are equal.
๏ท If the cross products are equivalent, the two ratios form a proportion.
๏ท If the cross products are not equal, the ratios DO NOT form a proportion.
Examples:
Determine whether each pair of ratios forms a proportion.
A) 1
3,3
9 B) 1.2
4, 2
5
Independent Practice: Determine if each pair of ratios are equivalent.
1) 2
3,8
12
2) 4
2,18
7
3) 1.5
5,3
9
4) 2.1
3.5 ,3
7
5) 5.3
15.9 ,2.7
8.1
6) 18
2.4 ,15
2
