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Finding the Fourth Proportional to 323,999.40, 485,999.10 and 218,245.80

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Solution

The fourth proportional to 323,999.40, 485,999.10 and 218,245.80 is: 327,368.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,999.40 : 485,999.10 = 218,245.80 : x
  2. Step 2: Convert to fraction form
    323,999.40/485,999.10 = 218,245.80/x
  3. Step 3: Cross multiply
    323,999.40x = 485,999.10 × 218,245.80
  4. Step 4: Simplify right side
    323,999.40x = 106,067,262,378.78
  5. Step 5: Solve for x
    x = 106,067,262,378.78/323,999.40
  6. Step 6: Final answer
    x = 327,368.70

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