One other note on the subject-
In order to be 4.8 MB @ 72 ppi, the print dimensions of each image file
would translate to ± 22"x15", even as jpegs. Remember that "shrinking"
the images in PPt doesn't make the image, itself, any smaller.
FWIW, Use PhotoShop to reduce the Document Size of each image to ±
3"x2" while maintaining the resolution @ 72-96 ppi (note the radical
drop in pixel dimension as you do), then place the new versions in your
presentation file.
BTW, The 72-96 ppi is assuming that the presentation is being delivered
on-screen. Print or 35mm output would require much higher resolution,
but keep the Document Size geared to the amount of space the image is
intended to occupy on a slide. |:>)
>> Stay informed about: high res. jpegs in power point