Homework Help: math

Posted by keisha on Saturday, November 24, 2007 at 11:44am.

Van Gogh's painting Starry Night measures 92 cm long by 73 cm high. You buy a poster that shows an enlargement of the painting. The poster measures 120 cm long by 100 cm high. Is the poster an accurate represenation of the painting?

I think the answer is no. Is this right?

math - Michael, Saturday, November 24, 2007 at 11:44am
How did you come up with that?
math - keisha, Saturday, November 24, 2007 at 11:49am
I made a proportion 92/73=120/100 and I cross multiplied. I divided the cross products and it came up to a demical.
math - Michael, Saturday, November 24, 2007 at 11:52am
If you cross-multiplied, you should have done (92)(100) = (73)(12). 920 doesn't equal 8760, so you know the picture is out of proportion. Your answer is correct.
- math - keisha, Saturday, November 24, 2007 at 11:59am
  thanks

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