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Finding the Fourth Proportional to 438.73, 658.02 and 195.21

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Solution

The fourth proportional to 438.73, 658.02 and 195.21 is: 292.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.73 : 658.02 = 195.21 : x
  2. Step 2: Convert to fraction form
    438.73/658.02 = 195.21/x
  3. Step 3: Cross multiply
    438.73x = 658.02 × 195.21
  4. Step 4: Simplify right side
    438.73x = 128,452.82
  5. Step 5: Solve for x
    x = 128,452.82/438.73
  6. Step 6: Final answer
    x = 292.78

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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.