Watch the Fourth Finger Love online guitar lesson by Brad Carlton from Chord Studies: Inversions Vol. 1

This is a four measure progression utilizing two different chords over two different string sets: Dm and C.  Each chord is played for one measure, and the first two chords are played on the second, third and fourth strings, while the last two chords are played on the third, fourth, and fifth strings.  As a fingering option, try to keep your fourth finger in contact with the fourth string through all four chords.  You'll see this approach will help to stabilize your fretting hand.