Home / 915,800-1,263,804-513,392

Finding the Fourth Proportional to 915,800, 1,263,804 and 513,392

Calculator

Solution

The fourth proportional to 915,800, 1,263,804 and 513,392 is: 708,480.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,800 : 1,263,804 = 513,392 : x
  2. Step 2: Convert to fraction form
    915,800/1,263,804 = 513,392/x
  3. Step 3: Cross multiply
    915,800x = 1,263,804 × 513,392
  4. Step 4: Simplify right side
    915,800x = 648,826,863,168
  5. Step 5: Solve for x
    x = 648,826,863,168/915,800
  6. Step 6: Final answer
    x = 708,480.96

Related Problems

Find fourth proportional to 457,900, 631,902 and 256,696
Half scale
Find fourth proportional to 1,831,600, 2,527,608 and 1,026,784
Double scale
Find fourth proportional to 915,801, 1,263,805.38 and 513,393
Similar ratio
Find fourth proportional to 1,373,700, 1,895,706 and 770,088
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.