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Finding the Fourth Proportional to 431,682.80, 647,524.20 and 265,564.40

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Solution

The fourth proportional to 431,682.80, 647,524.20 and 265,564.40 is: 398,346.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,682.80 : 647,524.20 = 265,564.40 : x
  2. Step 2: Convert to fraction form
    431,682.80/647,524.20 = 265,564.40/x
  3. Step 3: Cross multiply
    431,682.80x = 647,524.20 × 265,564.40
  4. Step 4: Simplify right side
    431,682.80x = 171,959,375,658.48
  5. Step 5: Solve for x
    x = 171,959,375,658.48/431,682.80
  6. Step 6: Final answer
    x = 398,346.60

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