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Finding the Fourth Proportional to 266.05, 398.77 and 92.55

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Solution

The fourth proportional to 266.05, 398.77 and 92.55 is: 138.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.05 : 398.77 = 92.55 : x
  2. Step 2: Convert to fraction form
    266.05/398.77 = 92.55/x
  3. Step 3: Cross multiply
    266.05x = 398.77 × 92.55
  4. Step 4: Simplify right side
    266.05x = 36,906.16
  5. Step 5: Solve for x
    x = 36,906.16/266.05
  6. Step 6: Final answer
    x = 138.72

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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.