Chapter 1: Ratios and Proportions Flashcards
1
Q
What is a Ratio?
A
Expresses a relationship between two components.
2
Q
How are Ratios written?
A
Using a colon between the two numbers (:) ( 2:1 is different from 1:2.
3
Q
What is a Proportion?
A
A equation which states that two ratios are equal.
4
Q
How are Proportions typically set up like?
A
1:2=2:4
5
Q
What are the middle numbers 1(:2)=(2):4 called?
A
Means.
6
Q
What are the end or outside numbers (1):2=2(:4) called?
A
Extremes.
7
Q
How to determine whether proportions are equal?
A
Comparing the product (multiplication) of the means to the product of the extremes.
8
Q
What is the firs step when using the Proportion 1:2=2:4?
A
Multiply the means (2x2=4) and the extremes (1x4=4) the means and extremes are equal so the proportions are equal.
