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Finding the Fourth Proportional to 331.18, 496.87 and 125.81

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Solution

The fourth proportional to 331.18, 496.87 and 125.81 is: 188.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.18 : 496.87 = 125.81 : x
  2. Step 2: Convert to fraction form
    331.18/496.87 = 125.81/x
  3. Step 3: Cross multiply
    331.18x = 496.87 × 125.81
  4. Step 4: Simplify right side
    331.18x = 62,511.21
  5. Step 5: Solve for x
    x = 62,511.21/331.18
  6. Step 6: Final answer
    x = 188.75

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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.