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Finding the Fourth Proportional to 439.25, 658.72 and 161.54

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Solution

The fourth proportional to 439.25, 658.72 and 161.54 is: 242.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.25 : 658.72 = 161.54 : x
  2. Step 2: Convert to fraction form
    439.25/658.72 = 161.54/x
  3. Step 3: Cross multiply
    439.25x = 658.72 × 161.54
  4. Step 4: Simplify right side
    439.25x = 106,405.53
  5. Step 5: Solve for x
    x = 106,405.53/439.25
  6. Step 6: Final answer
    x = 242.25

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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.