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Finding the Fourth Proportional to 278,984, 418,660.32 and 131,251.52

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Solution

The fourth proportional to 278,984, 418,660.32 and 131,251.52 is: 196,964.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,984 : 418,660.32 = 131,251.52 : x
  2. Step 2: Convert to fraction form
    278,984/418,660.32 = 131,251.52/x
  3. Step 3: Cross multiply
    278,984x = 418,660.32 × 131,251.52
  4. Step 4: Simplify right side
    278,984x = 54,949,803,363.69
  5. Step 5: Solve for x
    x = 54,949,803,363.69/278,984
  6. Step 6: Final answer
    x = 196,964.00

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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.