Image Proportions

[Rick Harrison]

Hi there,

I have a bunch of randomly sized large images that I want to
fit proportionally into a much smaller image frame.  Kind of
like making thumbnails.

I figure this has to be a common problem which probably
has a common solution.  Rather than re-invent the wheel
I thought I'd see if anyone on this list knows the formula
for doing this.

Thanks in advance!

Rick Harrison