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Finding the Fourth Proportional to 498,925.92, 687,708.92 and 389,839.52

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Solution

The fourth proportional to 498,925.92, 687,708.92 and 389,839.52 is: 537,346.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,925.92 : 687,708.92 = 389,839.52 : x
  2. Step 2: Convert to fraction form
    498,925.92/687,708.92 = 389,839.52/x
  3. Step 3: Cross multiply
    498,925.92x = 687,708.92 × 389,839.52
  4. Step 4: Simplify right side
    498,925.92x = 268,096,115,272.52
  5. Step 5: Solve for x
    x = 268,096,115,272.52/498,925.92
  6. Step 6: Final answer
    x = 537,346.54

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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.