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Finding the Fourth Proportional to 658.32, 908.43 and 378.54

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Solution

The fourth proportional to 658.32, 908.43 and 378.54 is: 522.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.32 : 908.43 = 378.54 : x
  2. Step 2: Convert to fraction form
    658.32/908.43 = 378.54/x
  3. Step 3: Cross multiply
    658.32x = 908.43 × 378.54
  4. Step 4: Simplify right side
    658.32x = 343,877.09
  5. Step 5: Solve for x
    x = 343,877.09/658.32
  6. Step 6: Final answer
    x = 522.36

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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.