Friday

December 19, 2014

December 19, 2014

Posted by **chrissy** on Wednesday, August 1, 2007 at 4:49pm.

The format for ratios is # : # :: # : #

Example 1: 2 :: 2 : ?

1 is one half of 2... so 2 would be one half of ? Four , of course.

Chrissy, here is an excellent site on how to set up ratios.

http://cstl.syr.edu/FIPSE/Decunit/ratios/ratios.htm

thank you ok that sounded simple. but is it always one half of a number or..can you give me an example or a problem and solve it out???

oooo thanks for the site. it will help me alot!

I'm sorry, the site I thought I posted wasn't the same one that was posted.

GuruBlue has given you an excellent site.

The problem you had stated that 2 inches on the blueprint equals 5 feet in the actual room. The problem asks the length of the actual measurement when it's 7 1/2 inches long on the blueprint. Here's the ratio I set up:

2 inches is to 5 feet as 7 1/2 inches is to x (the actual length).

This is shown as:

2 / 5 as 7 1/2 / x

We cross multiply the top of the first fraction with the bottom of the second fraction.

2x = 5 (7 1/2)

2x = 37.5

x = 18.75 = 18 3/4

**Answer this Question**

**Related Questions**

fine arts - i need to find two masks of the americas and oceania or the africas...

geometry circles equation i dont know - please he lp Find the equation of a ...

year 8 re-Re teachers - i posted this question before but can`t see it on the ...

Forgot my book, need science help!! - Please help me I have a whole section to ...

thanks - THANK YOU SO MUCH EVERYONE FOR SHOWING ME THAT ALGEBRA EQUATION ...

Algebra 1 - I need some help please. I dont understand the math that we are ...

english - I need help ASAP on this im writting a 6 paragraph essay and its due ...

Math - I just need a description of the following: Associative property of ...

Math - I just need a description of the following: Associative property of ...

ratio - In a school with 560 students, the ratio of students to teacher is 20 to...