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Finding the Fourth Proportional to 658.70, 908.98 and 396.66

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Solution

The fourth proportional to 658.70, 908.98 and 396.66 is: 547.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.70 : 908.98 = 396.66 : x
  2. Step 2: Convert to fraction form
    658.70/908.98 = 396.66/x
  3. Step 3: Cross multiply
    658.70x = 908.98 × 396.66
  4. Step 4: Simplify right side
    658.70x = 360,556.01
  5. Step 5: Solve for x
    x = 360,556.01/658.70
  6. Step 6: Final answer
    x = 547.38

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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.