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Finding the Fourth Proportional to 276.72, 415.08 and 122.55

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Solution

The fourth proportional to 276.72, 415.08 and 122.55 is: 183.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.72 : 415.08 = 122.55 : x
  2. Step 2: Convert to fraction form
    276.72/415.08 = 122.55/x
  3. Step 3: Cross multiply
    276.72x = 415.08 × 122.55
  4. Step 4: Simplify right side
    276.72x = 50,868.05
  5. Step 5: Solve for x
    x = 50,868.05/276.72
  6. Step 6: Final answer
    x = 183.83

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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.