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Finding the Fourth Proportional to 658.60, 908.00 and 409.49

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Solution

The fourth proportional to 658.60, 908.00 and 409.49 is: 564.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.60 : 908.00 = 409.49 : x
  2. Step 2: Convert to fraction form
    658.60/908.00 = 409.49/x
  3. Step 3: Cross multiply
    658.60x = 908.00 × 409.49
  4. Step 4: Simplify right side
    658.60x = 371,813.40
  5. Step 5: Solve for x
    x = 371,813.40/658.60
  6. Step 6: Final answer
    x = 564.55

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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.