document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=389355>Question 389355</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if a:b :: c:d, show that<BR>\n" );
document.write( "c^2 : d^2 = (a^2 +c^2): (b^2 + d^2) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #275888 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=275888\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%2Fb+=+c%2Fd ALIGN=MIDDLE  ALT=\"a%2Fb+=+c%2Fd\"   DISABLED_style= \"max-width:90%; height:auto;\" > ===> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5E2%2Fb%5E2+=+c%5E2%2Fd%5E2 ALIGN=MIDDLE  ALT=\"a%5E2%2Fb%5E2+=+c%5E2%2Fd%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > ====> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%5E2%2Fb%5E2+=+c%5E2%2Fd%5E2+=+%28a%5E2+%2B+c%5E2%29%2F%28b%5E2+%2B+d%5E2%29 ALIGN=MIDDLE  ALT=\"a%5E2%2Fb%5E2+=+c%5E2%2Fd%5E2+=+%28a%5E2+%2B+c%5E2%29%2F%28b%5E2+%2B+d%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, using the property of proportions that <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%2Fb+=+c%2Fd+=+%28a%2Bc%29%2F%28b%2Bd%29 ALIGN=MIDDLE  ALT=\"a%2Fb+=+c%2Fd+=+%28a%2Bc%29%2F%28b%2Bd%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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