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Finding the Fourth Proportional to 422.82, 634.25 and 399.73

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Solution

The fourth proportional to 422.82, 634.25 and 399.73 is: 599.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.82 : 634.25 = 399.73 : x
  2. Step 2: Convert to fraction form
    422.82/634.25 = 399.73/x
  3. Step 3: Cross multiply
    422.82x = 634.25 × 399.73
  4. Step 4: Simplify right side
    422.82x = 253,528.75
  5. Step 5: Solve for x
    x = 253,528.75/422.82
  6. Step 6: Final answer
    x = 599.61

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