Best way to make a dotted line in Pages for a printed form?

There's likely a number of ways but an easy one is to make all of your lines a little wider than you need, then draw a no-border, vertical box that overlaps the ends of them and color it the same color as the background. Your dotted lines will still be varying lengths but the overlapping box will cut them all off at the same spot.

The would be like drawing a number of horizontal lines of varying lengths on a piece of white paper, then laying another piece of white paper over the first, so that it overlaps the shortest line in the group.