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Finding the Fourth Proportional to 217.76, 326.64 and 89.52

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Solution

The fourth proportional to 217.76, 326.64 and 89.52 is: 134.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.76 : 326.64 = 89.52 : x
  2. Step 2: Convert to fraction form
    217.76/326.64 = 89.52/x
  3. Step 3: Cross multiply
    217.76x = 326.64 × 89.52
  4. Step 4: Simplify right side
    217.76x = 29,240.81
  5. Step 5: Solve for x
    x = 29,240.81/217.76
  6. Step 6: Final answer
    x = 134.28

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