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Old 09-27-2011, 08:35 PM   #4
glatt
 
Join Date: Jul 2003
Location: Arlington, VA
Posts: 27,717
It's a pretty simple algebra problem. And really the only kind of algebra I ever do any more. I figure out the answer to this exact problem more times than you can imagine. Change the inches to pixels and think about enlarging/reducing images and you've got the same question.

4/5 = 3.125/x
solve for x
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