Hi Gary, the method Burr shows is a good way to do it.

Just to clarify, that method involves using the Trim command to cut the ending edge so that it is in 2 pieces, and then you can use the Blend command to blend between those 2 pieces.

When you are in the Trim command when it asks you for cutting objects you click the "Add trim points" button to tell it you want to pick a point to cut at instead of selecting a cutting object.

Also before selecting the edge, hide any of the original construction curves that you may have right on top of it, otherwise it is difficult to select the surface edge because the curve will be in the way of it.

- Michael