Need help creating a slope between two lines - bath tub

[sketchup.one]

Hello everyone, is there a way to easily create a smooth slope between two lines? I am trying to create a bath tub, but I am having trouble with this step.

I have attached an image of my model. The slope needs to be between where the purple line starts (top of slope) towards the green line (bottom of slope).

Thank you!

[ateliernab]

with extensions, you can have a look at Curviloft.

without extensions, you can check the sandbox toolbar.
draw the purple line and place it at right height.
draw green line.

select both line and use the “from contour” tool of the sandbox. it should give you something to start from.

[sketchup.one]

It works! Thank you so much for your speedy solution. I used “from contours”.

[Box]

You could also have a play with follow me.