How to determine the distance between points on Converging diverging nozzle geometry
 

Hi i am creating an axis symmetric converging diverging nozzle i have attached the data i have come up to create the nozzle but i am not sure how to determine the distance between each radius point and hence the full length of the nozzle do i use a arbitrary value ? is the a specific equation ? thank you for the help in advance

Any help would be appreciated