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Finding the Fourth Proportional to 519.92, 717.50 and 283.87

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Solution

The fourth proportional to 519.92, 717.50 and 283.87 is: 391.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.92 : 717.50 = 283.87 : x
  2. Step 2: Convert to fraction form
    519.92/717.50 = 283.87/x
  3. Step 3: Cross multiply
    519.92x = 717.50 × 283.87
  4. Step 4: Simplify right side
    519.92x = 203,676.73
  5. Step 5: Solve for x
    x = 203,676.73/519.92
  6. Step 6: Final answer
    x = 391.75

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