Add Duration to a Date in a Measure to Get New Date

[jabbajuice08]

So I'm basically just trying to use a parameter that the user can select (1, 1.5, 2) to multiply by my Rem_Dur column and then add that new duration number to a start date column. 

For example, If the user selects 1.5, and one of the tasks has a Rem_Dur of 10, the new duration is 15. That task has a start date of 2/1/2023 so the new date that would be displayed in my measure would be 2/16/2023. I know I cannot use a calculated column since I need the date to be dynamic, but not sure what syntax to use. 

[yyzheng12]

I would try to use Switch and Selectedvalue dax functions: 

dynamic_selection_measure = switch(true(), selected(columnName) = value, action_measure_1, ...)