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Finding the Fourth Proportional to 331,540.80, 497,311.20 and 279,052.80

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Solution

The fourth proportional to 331,540.80, 497,311.20 and 279,052.80 is: 418,579.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,540.80 : 497,311.20 = 279,052.80 : x
  2. Step 2: Convert to fraction form
    331,540.80/497,311.20 = 279,052.80/x
  3. Step 3: Cross multiply
    331,540.80x = 497,311.20 × 279,052.80
  4. Step 4: Simplify right side
    331,540.80x = 138,776,082,831.36
  5. Step 5: Solve for x
    x = 138,776,082,831.36/331,540.80
  6. Step 6: Final answer
    x = 418,579.20

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