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Finding the Fourth Proportional to 519.99, 779.73 and 324.69

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Solution

The fourth proportional to 519.99, 779.73 and 324.69 is: 486.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.99 : 779.73 = 324.69 : x
  2. Step 2: Convert to fraction form
    519.99/779.73 = 324.69/x
  3. Step 3: Cross multiply
    519.99x = 779.73 × 324.69
  4. Step 4: Simplify right side
    519.99x = 253,170.53
  5. Step 5: Solve for x
    x = 253,170.53/519.99
  6. Step 6: Final answer
    x = 486.88

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