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Finding the Fourth Proportional to 276,712.38, 381,859.11 and 155,854.98

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Solution

The fourth proportional to 276,712.38, 381,859.11 and 155,854.98 is: 215,077.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,712.38 : 381,859.11 = 155,854.98 : x
  2. Step 2: Convert to fraction form
    276,712.38/381,859.11 = 155,854.98/x
  3. Step 3: Cross multiply
    276,712.38x = 381,859.11 × 155,854.98
  4. Step 4: Simplify right side
    276,712.38x = 59,514,643,951.87
  5. Step 5: Solve for x
    x = 59,514,643,951.87/276,712.38
  6. Step 6: Final answer
    x = 215,077.63

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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.