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Finding the Fourth Proportional to 57.31, 85.97 and 28.44

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Solution

The fourth proportional to 57.31, 85.97 and 28.44 is: 42.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.31 : 85.97 = 28.44 : x
  2. Step 2: Convert to fraction form
    57.31/85.97 = 28.44/x
  3. Step 3: Cross multiply
    57.31x = 85.97 × 28.44
  4. Step 4: Simplify right side
    57.31x = 2,444.99
  5. Step 5: Solve for x
    x = 2,444.99/57.31
  6. Step 6: Final answer
    x = 42.66

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