Today Harbeck told me to create a post on Proportion.

You can solve proportional reasoning using

*a fraction, a unit rate and a proportion.***Definition(s)**

*Proportion*-is a relationship that says that two ratios or two rates are equal

As I said before a proportion can be expressed as a fraction, unit rate and a proportion.

**Examples**

*60 sit ups in 3 minutes*

**Fraction**20 sit ups in 1 minute

You have to find what number makes the two proportions even.

60 sit ups/3 min

20 sit ups/1 min

you have to divide by 3 to get the 20 sit ups in 1 min

*Unit Rate*3 plants/0.5m squared

6 plants/1m squared

First you have to find how to get from 3 to 6.

If you know how to do it the answer will be times 2

so do it on both sides and you get 3 plants multiply by 2 is 6 plants

than 0.5 m sqrd multiply by 2 is 1 m sqrd

*Proportion*3 plants/0.5m sqrd

? plants/85m sqrd

First you find out what 85 divided bye 0.5 which is 170.

After that you multiply 170 by 3 and you get 510.

Which means the missing number is 510 (510 plants/85m sqrd).

If you don't understand what I mean go to this link

and look at the

*Key Ideas on page 66*
bruce nice scribepost. I liked how u put examples to make you definition more clear and thanks for putting a link for the etextbook. GOOD JOB!

ReplyDeletegood job! your scribepost is well explained.... you also made an example for us to understand it more well

ReplyDelete