SOLUTION: I am a fifth grader and we are working on proportions. I know how to figure out the missing number in a proportion where the problem is 1/3 = 1-1/3/N. You change 1-1/3 into 4/3 and

Algebra ->  Proportions -> SOLUTION: I am a fifth grader and we are working on proportions. I know how to figure out the missing number in a proportion where the problem is 1/3 = 1-1/3/N. You change 1-1/3 into 4/3 and      Log On


   



Question 310511: I am a fifth grader and we are working on proportions. I know how to figure out the missing number in a proportion where the problem is 1/3 = 1-1/3/N. You change 1-1/3 into 4/3 and solve the equation.
I get totally confused when N is on the other side of the equation, for example, N/8=1/3. Since 8 does not go into 3 I tried going to the lowest denominator, 24 and I come up with N = 3/24. This doesn't look right. Please help.

Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
with proportions all u do is cross multiply
N%2F8=1%2F3 same as1%2F3=N%2F8
cross multiply
N%2A3=1%2A8
3N=8divid by 3
N=8%2F3 or+N=22%2F3