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Finding the Fourth Proportional to 609.12, 913.38 and 243.61

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Solution

The fourth proportional to 609.12, 913.38 and 243.61 is: 365.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.12 : 913.38 = 243.61 : x
  2. Step 2: Convert to fraction form
    609.12/913.38 = 243.61/x
  3. Step 3: Cross multiply
    609.12x = 913.38 × 243.61
  4. Step 4: Simplify right side
    609.12x = 222,505.30
  5. Step 5: Solve for x
    x = 222,505.30/609.12
  6. Step 6: Final answer
    x = 365.29

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