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Finding the Fourth Proportional to 312,806.31, 431,612.60 and 198,004.20

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Solution

The fourth proportional to 312,806.31, 431,612.60 and 198,004.20 is: 273,207.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,806.31 : 431,612.60 = 198,004.20 : x
  2. Step 2: Convert to fraction form
    312,806.31/431,612.60 = 198,004.20/x
  3. Step 3: Cross multiply
    312,806.31x = 431,612.60 × 198,004.20
  4. Step 4: Simplify right side
    312,806.31x = 85,461,106,582.90
  5. Step 5: Solve for x
    x = 85,461,106,582.90/312,806.31
  6. Step 6: Final answer
    x = 273,207.75

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