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Finding the Fourth Proportional to 276,369.84, 381,359.48 and 155,508.66

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Solution

The fourth proportional to 276,369.84, 381,359.48 and 155,508.66 is: 214,584.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,369.84 : 381,359.48 = 155,508.66 : x
  2. Step 2: Convert to fraction form
    276,369.84/381,359.48 = 155,508.66/x
  3. Step 3: Cross multiply
    276,369.84x = 381,359.48 × 155,508.66
  4. Step 4: Simplify right side
    276,369.84x = 59,304,700,935.55
  5. Step 5: Solve for x
    x = 59,304,700,935.55/276,369.84
  6. Step 6: Final answer
    x = 214,584.56

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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.