Subscribe:

## Wednesday, October 12, 2011

### Diana's Proportion post

-ratio: A comparison of quantities in the same units
Example: Words-three compared to nine 0r 3 to 9
Ratio Notation- 3:9
fraction- 3/9
-rate: a comparison of 2 quantities measured in different units
Example:

-proportion- shows an equation which states that 2 ratios (fractions) are equal
Example:

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, keep the quantities in the same proportion? The orange juice is 50 ml to start with. I increase the orange juice to keep the quantities in the same proportion by multiplying it by 4 or 50 x 4 =200 total quantities of orange juice.
What are the three ways you can prove that equivalent ratio statements are true?
3/4 = 12/16 or 4/9 = 16/32

Find a video about using proportion and embed it in your post. Make sure you select the small size of the video.