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Finding the Fourth Proportional to 268.31, 402.21 and 94.85

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Solution

The fourth proportional to 268.31, 402.21 and 94.85 is: 142.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.31 : 402.21 = 94.85 : x
  2. Step 2: Convert to fraction form
    268.31/402.21 = 94.85/x
  3. Step 3: Cross multiply
    268.31x = 402.21 × 94.85
  4. Step 4: Simplify right side
    268.31x = 38,150.62
  5. Step 5: Solve for x
    x = 38,150.62/268.31
  6. Step 6: Final answer
    x = 142.19

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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.