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Finding the Fourth Proportional to 266.97, 400.49 and 74.60

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Solution

The fourth proportional to 266.97, 400.49 and 74.60 is: 111.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.97 : 400.49 = 74.60 : x
  2. Step 2: Convert to fraction form
    266.97/400.49 = 74.60/x
  3. Step 3: Cross multiply
    266.97x = 400.49 × 74.60
  4. Step 4: Simplify right side
    266.97x = 29,874.18
  5. Step 5: Solve for x
    x = 29,874.18/266.97
  6. Step 6: Final answer
    x = 111.90

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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.