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Finding the Fourth Proportional to 484.18, 668.16 and 287.68

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Solution

The fourth proportional to 484.18, 668.16 and 287.68 is: 396.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.18 : 668.16 = 287.68 : x
  2. Step 2: Convert to fraction form
    484.18/668.16 = 287.68/x
  3. Step 3: Cross multiply
    484.18x = 668.16 × 287.68
  4. Step 4: Simplify right side
    484.18x = 192,216.27
  5. Step 5: Solve for x
    x = 192,216.27/484.18
  6. Step 6: Final answer
    x = 396.99

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