Home / 721,920.27-996,237.92-399,623.55

Finding the Fourth Proportional to 721,920.27, 996,237.92 and 399,623.55

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Solution

The fourth proportional to 721,920.27, 996,237.92 and 399,623.55 is: 551,473.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,920.27 : 996,237.92 = 399,623.55 : x
  2. Step 2: Convert to fraction form
    721,920.27/996,237.92 = 399,623.55/x
  3. Step 3: Cross multiply
    721,920.27x = 996,237.92 × 399,623.55
  4. Step 4: Simplify right side
    721,920.27x = 398,120,132,236.90
  5. Step 5: Solve for x
    x = 398,120,132,236.90/721,920.27
  6. Step 6: Final answer
    x = 551,473.82

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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.