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Finding the Fourth Proportional to 636,324.66, 878,411.10 and 378,285.15

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Solution

The fourth proportional to 636,324.66, 878,411.10 and 378,285.15 is: 522,201.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,324.66 : 878,411.10 = 378,285.15 : x
  2. Step 2: Convert to fraction form
    636,324.66/878,411.10 = 378,285.15/x
  3. Step 3: Cross multiply
    636,324.66x = 878,411.10 × 378,285.15
  4. Step 4: Simplify right side
    636,324.66x = 332,289,874,725.17
  5. Step 5: Solve for x
    x = 332,289,874,725.17/636,324.66
  6. Step 6: Final answer
    x = 522,201.79

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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.