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Finding the Fourth Proportional to 276.73, 381.77 and 171.78

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Solution

The fourth proportional to 276.73, 381.77 and 171.78 is: 236.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.73 : 381.77 = 171.78 : x
  2. Step 2: Convert to fraction form
    276.73/381.77 = 171.78/x
  3. Step 3: Cross multiply
    276.73x = 381.77 × 171.78
  4. Step 4: Simplify right side
    276.73x = 65,581.83
  5. Step 5: Solve for x
    x = 65,581.83/276.73
  6. Step 6: Final answer
    x = 236.99

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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.