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Finding the Fourth Proportional to 636,436.17, 878,304.51 and 349,978.05

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Solution

The fourth proportional to 636,436.17, 878,304.51 and 349,978.05 is: 482,982.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,436.17 : 878,304.51 = 349,978.05 : x
  2. Step 2: Convert to fraction form
    636,436.17/878,304.51 = 349,978.05/x
  3. Step 3: Cross multiply
    636,436.17x = 878,304.51 × 349,978.05
  4. Step 4: Simplify right side
    636,436.17x = 307,387,299,716.01
  5. Step 5: Solve for x
    x = 307,387,299,716.01/636,436.17
  6. Step 6: Final answer
    x = 482,982.13

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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.