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Finding the Fourth Proportional to 421.31, 631.97 and 132.75

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Solution

The fourth proportional to 421.31, 631.97 and 132.75 is: 199.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.31 : 631.97 = 132.75 : x
  2. Step 2: Convert to fraction form
    421.31/631.97 = 132.75/x
  3. Step 3: Cross multiply
    421.31x = 631.97 × 132.75
  4. Step 4: Simplify right side
    421.31x = 83,893.85
  5. Step 5: Solve for x
    x = 83,893.85/421.31
  6. Step 6: Final answer
    x = 199.13

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