Tuesday, October 11, 2011

Amiel's Proportion Post

Amiel's Proportion Post

Ratios-are comparisons between two different things. For example ratio of apple and oranges in groups. Suppose there are thirty-five fruits fifteen of them are apples, the ratio of apples and oranges are 15 to 20.

Rates-are ratios are in two different quantities measured in units, it can be expressed as a fraction but not percent.

Proportions-are two equal ratios a proportion has 2 equivalent fractions (ratios).

Examples:
Ratio 4:5 Blue balls to orange balls.

Rate- 5 candies cost 10

2/Candy

Proportion-

1. 5 hours to travel 360 miles is about _____mph.
2.As a playgroup worker, if I increase the amount of apple juice I am serving at the playgroup from 25 ml to 100 ml, how much should I increase the the orange juice to, to keep the quantities in the same proportion? The orange juice is 50 ml to start with.

1.5 hours to travel 360 miles takes about 72 mph.

I would increace it by 4.

3/4 = 12/16 are equivalent
4/9 = 16/32 are not equivalent

It is not fair!

If I was the judge I would sentence Roy Brown to only 1 month and sentence Paul R. Allen to 15 years to jail.