On The Right Track Meaning

(idiomatic) Using the correct general approach to a particular task or problem; pursuing something in a promising way.

Example:   I don't think he has the final answer just yet, but he seems to be on the right track.
1955, Ray Charles, Greenbacks
  She looked at me with that familiar desire
  Her eyes lit up like they were on fire
  She said, "My name's Flo, and you're on the right track,
  But look here, daddy, I wear furs on my back,
  So if you want to have fun in this man's land,
  Let Lincoln and Jackson start shaking hands."