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Finding the Fourth Proportional to 276.42, 414.72 and 173.78

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Solution

The fourth proportional to 276.42, 414.72 and 173.78 is: 260.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.42 : 414.72 = 173.78 : x
  2. Step 2: Convert to fraction form
    276.42/414.72 = 173.78/x
  3. Step 3: Cross multiply
    276.42x = 414.72 × 173.78
  4. Step 4: Simplify right side
    276.42x = 72,067.97
  5. Step 5: Solve for x
    x = 72,067.97/276.42
  6. Step 6: Final answer
    x = 260.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.