The vertical proportions seem fine, you should focus more on the horizontal proportions: Shoulder width should be 2 heads in 7 and a half figure plate of loomis. In second image the torso looks thicker than normal too, the head a bit smaller. But overly good. I suggest you also do the practice with the mannequin as well so you know where each shape starts and ends (plate attached from the famous artists course - my figure drawing instructor made me draw it until I could do it from memory in no more than 30 minutes)

On your profile view, the reference line for the end of the hands sits quite a bit lower than in your back view, which makes the arms longer than they should be proportionally. If you adjust the reference line to match the back view, you'll get a much more proportionally correct arm. Hope this helps!

@Steve Lenze @Martha Muniz