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Finding the Fourth Proportional to 638,677.52, 956,931.81 and 385,425.84

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Solution

The fourth proportional to 638,677.52, 956,931.81 and 385,425.84 is: 577,484.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,677.52 : 956,931.81 = 385,425.84 : x
  2. Step 2: Convert to fraction form
    638,677.52/956,931.81 = 385,425.84/x
  3. Step 3: Cross multiply
    638,677.52x = 956,931.81 × 385,425.84
  4. Step 4: Simplify right side
    638,677.52x = 368,826,246,691.97
  5. Step 5: Solve for x
    x = 368,826,246,691.97/638,677.52
  6. Step 6: Final answer
    x = 577,484.31

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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.