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Finding the Fourth Proportional to 408.88, 612.90 and 226.36

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Solution

The fourth proportional to 408.88, 612.90 and 226.36 is: 339.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.88 : 612.90 = 226.36 : x
  2. Step 2: Convert to fraction form
    408.88/612.90 = 226.36/x
  3. Step 3: Cross multiply
    408.88x = 612.90 × 226.36
  4. Step 4: Simplify right side
    408.88x = 138,736.04
  5. Step 5: Solve for x
    x = 138,736.04/408.88
  6. Step 6: Final answer
    x = 339.31

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