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Finding the Fourth Proportional to 394.16, 591.16 and 231.72

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Solution

The fourth proportional to 394.16, 591.16 and 231.72 is: 347.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.16 : 591.16 = 231.72 : x
  2. Step 2: Convert to fraction form
    394.16/591.16 = 231.72/x
  3. Step 3: Cross multiply
    394.16x = 591.16 × 231.72
  4. Step 4: Simplify right side
    394.16x = 136,983.60
  5. Step 5: Solve for x
    x = 136,983.60/394.16
  6. Step 6: Final answer
    x = 347.53

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