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Finding the Fourth Proportional to 643,938.80, 965,130.60 and 328,233.20

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Solution

The fourth proportional to 643,938.80, 965,130.60 and 328,233.20 is: 491,953.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,938.80 : 965,130.60 = 328,233.20 : x
  2. Step 2: Convert to fraction form
    643,938.80/965,130.60 = 328,233.20/x
  3. Step 3: Cross multiply
    643,938.80x = 965,130.60 × 328,233.20
  4. Step 4: Simplify right side
    643,938.80x = 316,787,905,255.92
  5. Step 5: Solve for x
    x = 316,787,905,255.92/643,938.80
  6. Step 6: Final answer
    x = 491,953.44

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