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Finding the Fourth Proportional to 408.12, 561.97 and 369.04

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Solution

The fourth proportional to 408.12, 561.97 and 369.04 is: 508.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.12 : 561.97 = 369.04 : x
  2. Step 2: Convert to fraction form
    408.12/561.97 = 369.04/x
  3. Step 3: Cross multiply
    408.12x = 561.97 × 369.04
  4. Step 4: Simplify right side
    408.12x = 207,391.10
  5. Step 5: Solve for x
    x = 207,391.10/408.12
  6. Step 6: Final answer
    x = 508.17

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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.