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Finding the Fourth Proportional to 266.76, 397.80 and 251.94

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Solution

The fourth proportional to 266.76, 397.80 and 251.94 is: 375.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.76 : 397.80 = 251.94 : x
  2. Step 2: Convert to fraction form
    266.76/397.80 = 251.94/x
  3. Step 3: Cross multiply
    266.76x = 397.80 × 251.94
  4. Step 4: Simplify right side
    266.76x = 100,221.73
  5. Step 5: Solve for x
    x = 100,221.73/266.76
  6. Step 6: Final answer
    x = 375.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.