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Finding the Fourth Proportional to 878,778.72, 1,318,168.08 and 279,737.28

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Solution

The fourth proportional to 878,778.72, 1,318,168.08 and 279,737.28 is: 419,605.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,778.72 : 1,318,168.08 = 279,737.28 : x
  2. Step 2: Convert to fraction form
    878,778.72/1,318,168.08 = 279,737.28/x
  3. Step 3: Cross multiply
    878,778.72x = 1,318,168.08 × 279,737.28
  4. Step 4: Simplify right side
    878,778.72x = 368,740,753,282.02
  5. Step 5: Solve for x
    x = 368,740,753,282.02/878,778.72
  6. Step 6: Final answer
    x = 419,605.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.