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Finding the Fourth Proportional to 658.28, 908.40 and 409.58

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Solution

The fourth proportional to 658.28, 908.40 and 409.58 is: 565.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.28 : 908.40 = 409.58 : x
  2. Step 2: Convert to fraction form
    658.28/908.40 = 409.58/x
  3. Step 3: Cross multiply
    658.28x = 908.40 × 409.58
  4. Step 4: Simplify right side
    658.28x = 372,062.47
  5. Step 5: Solve for x
    x = 372,062.47/658.28
  6. Step 6: Final answer
    x = 565.20

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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.