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Finding the Fourth Proportional to 638,671.52, 956,922.80 and 385,419.87

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Solution

The fourth proportional to 638,671.52, 956,922.80 and 385,419.87 is: 577,475.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,671.52 : 956,922.80 = 385,419.87 : x
  2. Step 2: Convert to fraction form
    638,671.52/956,922.80 = 385,419.87/x
  3. Step 3: Cross multiply
    638,671.52x = 956,922.80 × 385,419.87
  4. Step 4: Simplify right side
    638,671.52x = 368,817,059,248.94
  5. Step 5: Solve for x
    x = 368,817,059,248.94/638,671.52
  6. Step 6: Final answer
    x = 577,475.35

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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.