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Finding the Fourth Proportional to 658.22, 908.34 and 378.47

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Solution

The fourth proportional to 658.22, 908.34 and 378.47 is: 522.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.22 : 908.34 = 378.47 : x
  2. Step 2: Convert to fraction form
    658.22/908.34 = 378.47/x
  3. Step 3: Cross multiply
    658.22x = 908.34 × 378.47
  4. Step 4: Simplify right side
    658.22x = 343,774.90
  5. Step 5: Solve for x
    x = 343,774.90/658.22
  6. Step 6: Final answer
    x = 522.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.