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Finding the Fourth Proportional to 438.44, 658.36 and 255.97

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Solution

The fourth proportional to 438.44, 658.36 and 255.97 is: 384.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.44 : 658.36 = 255.97 : x
  2. Step 2: Convert to fraction form
    438.44/658.36 = 255.97/x
  3. Step 3: Cross multiply
    438.44x = 658.36 × 255.97
  4. Step 4: Simplify right side
    438.44x = 168,520.41
  5. Step 5: Solve for x
    x = 168,520.41/438.44
  6. Step 6: Final answer
    x = 384.36

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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.