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Finding the Fourth Proportional to 257.41, 355.22 and 140.97

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Solution

The fourth proportional to 257.41, 355.22 and 140.97 is: 194.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.41 : 355.22 = 140.97 : x
  2. Step 2: Convert to fraction form
    257.41/355.22 = 140.97/x
  3. Step 3: Cross multiply
    257.41x = 355.22 × 140.97
  4. Step 4: Simplify right side
    257.41x = 50,075.36
  5. Step 5: Solve for x
    x = 50,075.36/257.41
  6. Step 6: Final answer
    x = 194.54

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