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Finding the Fourth Proportional to 331,643.80, 496,407.30 and 261,659.80

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Solution

The fourth proportional to 331,643.80, 496,407.30 and 261,659.80 is: 391,654.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,643.80 : 496,407.30 = 261,659.80 : x
  2. Step 2: Convert to fraction form
    331,643.80/496,407.30 = 261,659.80/x
  3. Step 3: Cross multiply
    331,643.80x = 496,407.30 × 261,659.80
  4. Step 4: Simplify right side
    331,643.80x = 129,889,834,836.54
  5. Step 5: Solve for x
    x = 129,889,834,836.54/331,643.80
  6. Step 6: Final answer
    x = 391,654.65

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