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Finding the Fourth Proportional to 636,406, 878,217.80 and 349,924.08

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Solution

The fourth proportional to 636,406, 878,217.80 and 349,924.08 is: 482,882.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,406 : 878,217.80 = 349,924.08 : x
  2. Step 2: Convert to fraction form
    636,406/878,217.80 = 349,924.08/x
  3. Step 3: Cross multiply
    636,406x = 878,217.80 × 349,924.08
  4. Step 4: Simplify right side
    636,406x = 307,309,555,704.62
  5. Step 5: Solve for x
    x = 307,309,555,704.62/636,406
  6. Step 6: Final answer
    x = 482,882.87

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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.