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Finding the Fourth Proportional to 323,622.80, 485,434.20 and 211,648.40

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Solution

The fourth proportional to 323,622.80, 485,434.20 and 211,648.40 is: 317,472.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,622.80 : 485,434.20 = 211,648.40 : x
  2. Step 2: Convert to fraction form
    323,622.80/485,434.20 = 211,648.40/x
  3. Step 3: Cross multiply
    323,622.80x = 485,434.20 × 211,648.40
  4. Step 4: Simplify right side
    323,622.80x = 102,741,371,735.28
  5. Step 5: Solve for x
    x = 102,741,371,735.28/323,622.80
  6. Step 6: Final answer
    x = 317,472.60

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