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Finding the Fourth Proportional to 310.97, 429 and 212.55

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Solution

The fourth proportional to 310.97, 429 and 212.55 is: 293.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.97 : 429 = 212.55 : x
  2. Step 2: Convert to fraction form
    310.97/429 = 212.55/x
  3. Step 3: Cross multiply
    310.97x = 429 × 212.55
  4. Step 4: Simplify right side
    310.97x = 91,183.95
  5. Step 5: Solve for x
    x = 91,183.95/310.97
  6. Step 6: Final answer
    x = 293.23

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