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Finding the Fourth Proportional to 279,046.27, 385,081.14 and 151,721.87

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Solution

The fourth proportional to 279,046.27, 385,081.14 and 151,721.87 is: 209,374.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,046.27 : 385,081.14 = 151,721.87 : x
  2. Step 2: Convert to fraction form
    279,046.27/385,081.14 = 151,721.87/x
  3. Step 3: Cross multiply
    279,046.27x = 385,081.14 × 151,721.87
  4. Step 4: Simplify right side
    279,046.27x = 58,425,228,737.13
  5. Step 5: Solve for x
    x = 58,425,228,737.13/279,046.27
  6. Step 6: Final answer
    x = 209,374.70

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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.