Question: "Q.19 If a : b = 3 : 7 and b : c = 4 : 9, then find a : b : c. ![Stem](https://pquuaptgyoxizyauhmtu.supabase.co/storag..." | TestX

Loading Question: "Q.19 If a : b = 3 : 7 and b : c = 4 : 9, then find a : b : c. ![Stem](https://pquuaptgyoxizyauhmtu.supabase.co/storag..." | TestX...