Create your own problem using ratio is 2: 5: 6: n

Add first the parts then divide it by the total:  1+6+8 = 15  5,250,000÷15 = 350,000  Divide it to each part:  350,000 × 1 = 350,000 350,000 × 6 = 2,100,000 350,000 × 8 = 2,800,000  If added altogether:  350,000+2,100,000+2,800,000 = 5,250,000