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Finding the Fourth Proportional to 636,349.91, 878,180.18 and 345,981

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Solution

The fourth proportional to 636,349.91, 878,180.18 and 345,981 is: 477,463.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,349.91 : 878,180.18 = 345,981 : x
  2. Step 2: Convert to fraction form
    636,349.91/878,180.18 = 345,981/x
  3. Step 3: Cross multiply
    636,349.91x = 878,180.18 × 345,981
  4. Step 4: Simplify right side
    636,349.91x = 303,833,655,126.68
  5. Step 5: Solve for x
    x = 303,833,655,126.68/636,349.91
  6. Step 6: Final answer
    x = 477,463.19

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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.