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Finding the Fourth Proportional to 516.12, 774.30 and 439.62

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Solution

The fourth proportional to 516.12, 774.30 and 439.62 is: 659.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.12 : 774.30 = 439.62 : x
  2. Step 2: Convert to fraction form
    516.12/774.30 = 439.62/x
  3. Step 3: Cross multiply
    516.12x = 774.30 × 439.62
  4. Step 4: Simplify right side
    516.12x = 340,397.77
  5. Step 5: Solve for x
    x = 340,397.77/516.12
  6. Step 6: Final answer
    x = 659.53

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