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Finding the Fourth Proportional to 483.98, 667.76 and 287.42

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Solution

The fourth proportional to 483.98, 667.76 and 287.42 is: 396.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.98 : 667.76 = 287.42 : x
  2. Step 2: Convert to fraction form
    483.98/667.76 = 287.42/x
  3. Step 3: Cross multiply
    483.98x = 667.76 × 287.42
  4. Step 4: Simplify right side
    483.98x = 191,922.80
  5. Step 5: Solve for x
    x = 191,922.80/483.98
  6. Step 6: Final answer
    x = 396.56

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