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Finding the Fourth Proportional to 483.91, 667.78 and 287.48

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Solution

The fourth proportional to 483.91, 667.78 and 287.48 is: 396.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.91 : 667.78 = 287.48 : x
  2. Step 2: Convert to fraction form
    483.91/667.78 = 287.48/x
  3. Step 3: Cross multiply
    483.91x = 667.78 × 287.48
  4. Step 4: Simplify right side
    483.91x = 191,974.35
  5. Step 5: Solve for x
    x = 191,974.35/483.91
  6. Step 6: Final answer
    x = 396.72

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