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Finding the Fourth Proportional to 399.25, 550.97 and 224.61

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Solution

The fourth proportional to 399.25, 550.97 and 224.61 is: 309.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.25 : 550.97 = 224.61 : x
  2. Step 2: Convert to fraction form
    399.25/550.97 = 224.61/x
  3. Step 3: Cross multiply
    399.25x = 550.97 × 224.61
  4. Step 4: Simplify right side
    399.25x = 123,749.49
  5. Step 5: Solve for x
    x = 123,749.49/399.25
  6. Step 6: Final answer
    x = 309.95

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