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## Wednesday, October 12, 2011

### Michael's Propotion Post

Ratio- The relation between two similar numbers (1:2)
Rate- A comparison of two quantities measured in different units. \$1.69 per 100 grams or \$1.69/100 g is a rate for purchasing bulk food. 72 beats per minute or 72 beats/min is a heart rate.
Proportion- An equation which states that two ratios (fractions) are equal.

1. 5 hours to travel 360 miles is about 72 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. You can just x2

What are the three ways you can prove that equivalent ratio statements are true?
3/4 = 12/16 or 4/9 = 16/32 Three ways you can prove it is equivalent is cross multiply , horizontal, vertical, and diagonal.
4/9 = 16/32 is FALSE because what you do to the top and the bottom the answer is different.