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Finding the Fourth Proportional to 408.90, 613.29 and 134.99

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Solution

The fourth proportional to 408.90, 613.29 and 134.99 is: 202.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.90 : 613.29 = 134.99 : x
  2. Step 2: Convert to fraction form
    408.90/613.29 = 134.99/x
  3. Step 3: Cross multiply
    408.90x = 613.29 × 134.99
  4. Step 4: Simplify right side
    408.90x = 82,784.95
  5. Step 5: Solve for x
    x = 82,784.95/408.90
  6. Step 6: Final answer
    x = 202.46

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