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Finding the Fourth Proportional to 878,884, 1,318,463.52 and 279,979.36

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Solution

The fourth proportional to 878,884, 1,318,463.52 and 279,979.36 is: 420,012.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,884 : 1,318,463.52 = 279,979.36 : x
  2. Step 2: Convert to fraction form
    878,884/1,318,463.52 = 279,979.36/x
  3. Step 3: Cross multiply
    878,884x = 1,318,463.52 × 279,979.36
  4. Step 4: Simplify right side
    878,884x = 369,142,572,512.95
  5. Step 5: Solve for x
    x = 369,142,572,512.95/878,884
  6. Step 6: Final answer
    x = 420,012.85

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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.