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Finding the Fourth Proportional to 439.21, 658.81 and 114.58

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Solution

The fourth proportional to 439.21, 658.81 and 114.58 is: 171.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.21 : 658.81 = 114.58 : x
  2. Step 2: Convert to fraction form
    439.21/658.81 = 114.58/x
  3. Step 3: Cross multiply
    439.21x = 658.81 × 114.58
  4. Step 4: Simplify right side
    439.21x = 75,483.16
  5. Step 5: Solve for x
    x = 75,483.16/439.21
  6. Step 6: Final answer
    x = 171.86

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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.