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Finding the Fourth Proportional to 323.78, 485.91 and 118.54

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Solution

The fourth proportional to 323.78, 485.91 and 118.54 is: 177.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.78 : 485.91 = 118.54 : x
  2. Step 2: Convert to fraction form
    323.78/485.91 = 118.54/x
  3. Step 3: Cross multiply
    323.78x = 485.91 × 118.54
  4. Step 4: Simplify right side
    323.78x = 57,598.56
  5. Step 5: Solve for x
    x = 57,598.56/323.78
  6. Step 6: Final answer
    x = 177.90

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