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March 13th, 2013, 09:31 AM  #1 
Senior Member Joined: Feb 2013 Posts: 114 Thanks: 0  Ratio and Proportion
If , prove that x+y+z=0 Can we proceed like this : Let = we get : Please guide further ..... 
March 13th, 2013, 10:10 AM  #2 
Member Joined: Mar 2013 Posts: 90 Thanks: 0  Re: Ratio and proportion 
March 13th, 2013, 10:22 AM  #3 
Global Moderator Joined: Dec 2006 Posts: 17,482 Thanks: 1314 
If each fraction is equal to n, x + y + z = ((bc)(b+c2a) + (ca)(c+a2b) + (ab)(a+b2c))n = ((bc)(ba) + (bc)(ca) + (ca)(cb) + (ca)(ab) + (ab)(ac) + (ab)(bc))n = 0. 

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proportion, ratio 
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