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Finding the Fourth Proportional to 252.76, 378.60 and 222.40

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Solution

The fourth proportional to 252.76, 378.60 and 222.40 is: 333.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.76 : 378.60 = 222.40 : x
  2. Step 2: Convert to fraction form
    252.76/378.60 = 222.40/x
  3. Step 3: Cross multiply
    252.76x = 378.60 × 222.40
  4. Step 4: Simplify right side
    252.76x = 84,200.64
  5. Step 5: Solve for x
    x = 84,200.64/252.76
  6. Step 6: Final answer
    x = 333.12

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