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Finding the Fourth Proportional to 636,432.67, 878,299.68 and 349,974.55

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Solution

The fourth proportional to 636,432.67, 878,299.68 and 349,974.55 is: 482,977.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,432.67 : 878,299.68 = 349,974.55 : x
  2. Step 2: Convert to fraction form
    636,432.67/878,299.68 = 349,974.55/x
  3. Step 3: Cross multiply
    636,432.67x = 878,299.68 × 349,974.55
  4. Step 4: Simplify right side
    636,432.67x = 307,382,535,273.14
  5. Step 5: Solve for x
    x = 307,382,535,273.14/636,432.67
  6. Step 6: Final answer
    x = 482,977.30

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1.5x scale

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.