Introducing an interpolate option in the add nodes extention

In many of my jobs, I have to put(add) nodes on a drawing (line, curve, spline, ...) where the length between the 2 firsts AND between the 2 lasts are specified AND the number of nodes to add - or a number of segments to define in the drawing.

For example, I have a line witch is 15 cm long. I will add 4 nodes (or define 5 segments). The distance between the start node and the first added node is 5 cm and the distance between the end node and the last added is 1 cm.
The distance between all the nodes will decrease proportionaly from 5 cm to 1 cm like this : 5 cm, 4 cm, 3 cm, 2 cm and 1 cm. (This example is very simple but I may use a drawing witche measure 23.58 cm, I will define 9 segments and the first segment is 7.56 cm long and the last 1.85 cm long.)
This will amso works with the shortest segment in first place and the longest at last place in the drawing.

A tool that do somithing like this is "Interpolate" but that tool work only on paths and not when adding nodes.

Thank you.