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Finding the Fourth Proportional to 636,807.18, 878,793.78 and 382,158.57

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Solution

The fourth proportional to 636,807.18, 878,793.78 and 382,158.57 is: 527,378.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,807.18 : 878,793.78 = 382,158.57 : x
  2. Step 2: Convert to fraction form
    636,807.18/878,793.78 = 382,158.57/x
  3. Step 3: Cross multiply
    636,807.18x = 878,793.78 × 382,158.57
  4. Step 4: Simplify right side
    636,807.18x = 335,838,574,289.70
  5. Step 5: Solve for x
    x = 335,838,574,289.70/636,807.18
  6. Step 6: Final answer
    x = 527,378.75

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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.