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Finding the Fourth Proportional to 400.43, 600.75 and 126.56

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Solution

The fourth proportional to 400.43, 600.75 and 126.56 is: 189.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.43 : 600.75 = 126.56 : x
  2. Step 2: Convert to fraction form
    400.43/600.75 = 126.56/x
  3. Step 3: Cross multiply
    400.43x = 600.75 × 126.56
  4. Step 4: Simplify right side
    400.43x = 76,027.92
  5. Step 5: Solve for x
    x = 76,027.92/400.43
  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.