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Finding the Fourth Proportional to 636,394.78, 878,228.01 and 349,933.30

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Solution

The fourth proportional to 636,394.78, 878,228.01 and 349,933.30 is: 482,909.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,394.78 : 878,228.01 = 349,933.30 : x
  2. Step 2: Convert to fraction form
    636,394.78/878,228.01 = 349,933.30/x
  3. Step 3: Cross multiply
    636,394.78x = 878,228.01 × 349,933.30
  4. Step 4: Simplify right side
    636,394.78x = 307,321,225,691.73
  5. Step 5: Solve for x
    x = 307,321,225,691.73/636,394.78
  6. Step 6: Final answer
    x = 482,909.72

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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.