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Finding the Fourth Proportional to 576,631.71, 864,951.21 and 378,212.49

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Solution

The fourth proportional to 576,631.71, 864,951.21 and 378,212.49 is: 567,321.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,631.71 : 864,951.21 = 378,212.49 : x
  2. Step 2: Convert to fraction form
    576,631.71/864,951.21 = 378,212.49/x
  3. Step 3: Cross multiply
    576,631.71x = 864,951.21 × 378,212.49
  4. Step 4: Simplify right side
    576,631.71x = 327,135,350,862.61
  5. Step 5: Solve for x
    x = 327,135,350,862.61/576,631.71
  6. Step 6: Final answer
    x = 567,321.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.