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Finding the Fourth Proportional to 481.73, 721.38 and 318.92

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Solution

The fourth proportional to 481.73, 721.38 and 318.92 is: 477.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.73 : 721.38 = 318.92 : x
  2. Step 2: Convert to fraction form
    481.73/721.38 = 318.92/x
  3. Step 3: Cross multiply
    481.73x = 721.38 × 318.92
  4. Step 4: Simplify right side
    481.73x = 230,062.51
  5. Step 5: Solve for x
    x = 230,062.51/481.73
  6. Step 6: Final answer
    x = 477.58

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