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Finding the Fourth Proportional to 239.28, 358.98 and 129.60

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Solution

The fourth proportional to 239.28, 358.98 and 129.60 is: 194.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.28 : 358.98 = 129.60 : x
  2. Step 2: Convert to fraction form
    239.28/358.98 = 129.60/x
  3. Step 3: Cross multiply
    239.28x = 358.98 × 129.60
  4. Step 4: Simplify right side
    239.28x = 46,521.37
  5. Step 5: Solve for x
    x = 46,521.37/239.28
  6. Step 6: Final answer
    x = 194.42

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