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Finding the Fourth Proportional to 518, 777.16 and 274.68

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Solution

The fourth proportional to 518, 777.16 and 274.68 is: 412.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    518 : 777.16 = 274.68 : x
  2. Step 2: Convert to fraction form
    518/777.16 = 274.68/x
  3. Step 3: Cross multiply
    518x = 777.16 × 274.68
  4. Step 4: Simplify right side
    518x = 213,470.31
  5. Step 5: Solve for x
    x = 213,470.31/518
  6. Step 6: Final answer
    x = 412.10

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