document.write( "Question 1125866: If a:b=4:5 and b:c=7:8, find a:b:c \n" ); document.write( "

Algebra.Com's Answer #742192 by josmiceli(19441) $\"\"$ $\"About$

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$\"+a%2Fb+=+4%2F5+\"$
\n" ); document.write( " $\"+a+=+%284%2F5%29%2Ab+\"$
\n" ); document.write( "------
\n" ); document.write( " $\"+b%2Fc+=+7%2F8+\"$
\n" ); document.write( " $\"+c+=+%288%2F7%29%2Ab+\"$
\n" ); document.write( "------
\n" ); document.write( "(4/5)*b : b : (8/7)*b
\n" ); document.write( "multiply ratio by $\"+35+\"$
\n" ); document.write( "28b : 35b : 40b
\n" ); document.write( "divide ratio by $\"+b+\"$
\n" ); document.write( "28:35:40\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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