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Finding the Fourth Proportional to 636,320.68, 878,123.14 and 349,845.64

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Solution

The fourth proportional to 636,320.68, 878,123.14 and 349,845.64 is: 482,787.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,320.68 : 878,123.14 = 349,845.64 : x
  2. Step 2: Convert to fraction form
    636,320.68/878,123.14 = 349,845.64/x
  3. Step 3: Cross multiply
    636,320.68x = 878,123.14 × 349,845.64
  4. Step 4: Simplify right side
    636,320.68x = 307,207,551,912.11
  5. Step 5: Solve for x
    x = 307,207,551,912.11/636,320.68
  6. Step 6: Final answer
    x = 482,787.31

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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.