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Finding the Fourth Proportional to 400.42, 600.77 and 126.55

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Solution

The fourth proportional to 400.42, 600.77 and 126.55 is: 189.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.42 : 600.77 = 126.55 : x
  2. Step 2: Convert to fraction form
    400.42/600.77 = 126.55/x
  3. Step 3: Cross multiply
    400.42x = 600.77 × 126.55
  4. Step 4: Simplify right side
    400.42x = 76,027.44
  5. Step 5: Solve for x
    x = 76,027.44/400.42
  6. Step 6: Final answer
    x = 189.87

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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.