Home / 724,429.20-999,664.92-402,139.20

Finding the Fourth Proportional to 724,429.20, 999,664.92 and 402,139.20

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Solution

The fourth proportional to 724,429.20, 999,664.92 and 402,139.20 is: 554,925.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,429.20 : 999,664.92 = 402,139.20 : x
  2. Step 2: Convert to fraction form
    724,429.20/999,664.92 = 402,139.20/x
  3. Step 3: Cross multiply
    724,429.20x = 999,664.92 × 402,139.20
  4. Step 4: Simplify right side
    724,429.20x = 402,004,451,196.86
  5. Step 5: Solve for x
    x = 402,004,451,196.86/724,429.20
  6. Step 6: Final answer
    x = 554,925.80

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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.