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Finding the Fourth Proportional to 276,092.15, 381,007.80 and 155,234.48

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Solution

The fourth proportional to 276,092.15, 381,007.80 and 155,234.48 is: 214,223.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,092.15 : 381,007.80 = 155,234.48 : x
  2. Step 2: Convert to fraction form
    276,092.15/381,007.80 = 155,234.48/x
  3. Step 3: Cross multiply
    276,092.15x = 381,007.80 × 155,234.48
  4. Step 4: Simplify right side
    276,092.15x = 59,145,545,803.91
  5. Step 5: Solve for x
    x = 59,145,545,803.91/276,092.15
  6. Step 6: Final answer
    x = 214,223.94

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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.