Question

4,m,16ratio & proportion

Answer 1

APROPORTION IS A STATEMENTthat tworatiosare the same.5 is to 15 as 8 is to 24.5 is the third part of 15, just as 8 is the third part of 24.We will now introduce this symbol 5 :15 to signify the ratio of 5 to 15. A proportion will then appear as follows:5 : 15 = 8 : 24."5 is to 15 as 8 is to 24."Problem 1. Read the following. Why is each one a proportion?a) 2 : 6 = 10 : 30b) 12 : 3 = 24 : 6c) 2 : 3 = 10 : 15Problem 2. Complete each proportion.a) 1 : 2= 5 :b) 3 : 9 =: 30c) 4 : 1 = 20 :d) 49 : 7=: 8e) 6 : 42 =9 :f) 18 : 2 = 45 :g) 2 : 3=: 15h) 3 : 4 =: 100i) 2 : 5 =: 50Problem 3.AB, CD are straight lines, and AB is three fifths of CD. Express that ratio as a proportion.