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Finding the Fourth Proportional to 443,080.20, 664,620.30 and 394,091.40

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Solution

The fourth proportional to 443,080.20, 664,620.30 and 394,091.40 is: 591,137.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,080.20 : 664,620.30 = 394,091.40 : x
  2. Step 2: Convert to fraction form
    443,080.20/664,620.30 = 394,091.40/x
  3. Step 3: Cross multiply
    443,080.20x = 664,620.30 × 394,091.40
  4. Step 4: Simplify right side
    443,080.20x = 261,921,144,495.42
  5. Step 5: Solve for x
    x = 261,921,144,495.42/443,080.20
  6. Step 6: Final answer
    x = 591,137.10

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