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Finding the Fourth Proportional to 636,622.20, 878,244.12 and 381,530.52

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Solution

The fourth proportional to 636,622.20, 878,244.12 and 381,530.52 is: 526,335.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,622.20 : 878,244.12 = 381,530.52 : x
  2. Step 2: Convert to fraction form
    636,622.20/878,244.12 = 381,530.52/x
  3. Step 3: Cross multiply
    636,622.20x = 878,244.12 × 381,530.52
  4. Step 4: Simplify right side
    636,622.20x = 335,076,935,790.54
  5. Step 5: Solve for x
    x = 335,076,935,790.54/636,622.20
  6. Step 6: Final answer
    x = 526,335.61

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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.