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Finding the Fourth Proportional to 642.02, 963.44 and 231.15

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Solution

The fourth proportional to 642.02, 963.44 and 231.15 is: 346.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.02 : 963.44 = 231.15 : x
  2. Step 2: Convert to fraction form
    642.02/963.44 = 231.15/x
  3. Step 3: Cross multiply
    642.02x = 963.44 × 231.15
  4. Step 4: Simplify right side
    642.02x = 222,698.87
  5. Step 5: Solve for x
    x = 222,698.87/642.02
  6. Step 6: Final answer
    x = 346.87

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