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Finding the Fourth Proportional to 408.81, 613.22 and 134.90

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Solution

The fourth proportional to 408.81, 613.22 and 134.90 is: 202.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.81 : 613.22 = 134.90 : x
  2. Step 2: Convert to fraction form
    408.81/613.22 = 134.90/x
  3. Step 3: Cross multiply
    408.81x = 613.22 × 134.90
  4. Step 4: Simplify right side
    408.81x = 82,723.38
  5. Step 5: Solve for x
    x = 82,723.38/408.81
  6. Step 6: Final answer
    x = 202.35

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