Depending on year and country the ratio could be 4.44, 4.65, or 4.78.

All US Sportages 1996 - 2002 are 4.78.

And yes, the ratio has to be the same in the front and rear. So you can't install a rear 4.65 LSD in a Sportage that has a 4.44 front diff.

1998 Sportage - Gone.
2004 Honda Civic Coupe.
2007 Suzuki Grand Vitara - She got it.