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Finding the Fourth Proportional to 278,980, 418,654.32 and 131,247.52

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Solution

The fourth proportional to 278,980, 418,654.32 and 131,247.52 is: 196,957.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,980 : 418,654.32 = 131,247.52 : x
  2. Step 2: Convert to fraction form
    278,980/418,654.32 = 131,247.52/x
  3. Step 3: Cross multiply
    278,980x = 418,654.32 × 131,247.52
  4. Step 4: Simplify right side
    278,980x = 54,947,341,237.29
  5. Step 5: Solve for x
    x = 54,947,341,237.29/278,980
  6. Step 6: Final answer
    x = 196,957.99

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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.