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Finding the Fourth Proportional to 266.74, 400.12 and 71.74

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Solution

The fourth proportional to 266.74, 400.12 and 71.74 is: 107.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.74 : 400.12 = 71.74 : x
  2. Step 2: Convert to fraction form
    266.74/400.12 = 71.74/x
  3. Step 3: Cross multiply
    266.74x = 400.12 × 71.74
  4. Step 4: Simplify right side
    266.74x = 28,704.93
  5. Step 5: Solve for x
    x = 28,704.93/266.74
  6. Step 6: Final answer
    x = 107.61

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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.