
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
March 18th, 2013, 06:50 AM  #1 
Senior Member Joined: Feb 2013 Posts: 114 Thanks: 0  Ratio and Proportion I
If a,b,c,d are in continued proportion, prove that : After solving L.H.S I got : But after solving R.H.S I am getting ... Please help. 
March 18th, 2013, 09:35 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 18,841 Thanks: 1564 
As a/b = b/c and c/b = d/c, first square term of LHS = (a/c  b/c + a/b  c/b)² = (a/c  d/c)² = ((a  d)/c)². Similarly, the second square term of LHS = ((d  a)/b)². The rest is easy. 

Tags 
proportion, ratio 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
ContinuedProportion  Aman Verma  Algebra  3  January 7th, 2014 03:54 PM 
Ratio and Proportion  sachinrajsharma  Algebra  2  March 13th, 2013 10:22 AM 
Proportion  haftakhan  Algebra  2  July 5th, 2010 01:49 PM 
What proportion  Mahonroy  Advanced Statistics  2  September 8th, 2009 08:39 AM 
Proportion in music...  Aeroplay  Number Theory  11  July 28th, 2009 02:59 PM 