There are several ways to know your distance from the runway. Three miles = 1000' of elevation awareness should be SOP. You can be below, or above, the 3 to 1 rule so it's not a requirement to follow it blindly. Fast and below the 3:1? You're doing ok. Fast and one, or above, the 3:1? Things need to change (drag). It should be part of the overall S.A. picture.