I used Ned's answer to get my 3 text fields scrolling together based on the value of one of them. Thanks Ned!
The other two text fields scroll to match the 'parent' text field, but at the end - as you reach the last scroll position - the other two do not update and the 3 text fields are out of alignment. Its just at the end of the scroll. The rest of the scroll values align. I'm thinking if I can find the max scrollV value, I can force the other two to scroll one last time when that value is reached by the 'parent' text field.