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Finding the Fourth Proportional to 266.97, 400.32 and 122.57

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Solution

The fourth proportional to 266.97, 400.32 and 122.57 is: 183.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.97 : 400.32 = 122.57 : x
  2. Step 2: Convert to fraction form
    266.97/400.32 = 122.57/x
  3. Step 3: Cross multiply
    266.97x = 400.32 × 122.57
  4. Step 4: Simplify right side
    266.97x = 49,064.61
  5. Step 5: Solve for x
    x = 49,064.61/266.97
  6. Step 6: Final answer
    x = 183.78

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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.