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Finding the Fourth Proportional to 279,865.80, 419,798.70 and 256,246.20

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Solution

The fourth proportional to 279,865.80, 419,798.70 and 256,246.20 is: 384,369.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,865.80 : 419,798.70 = 256,246.20 : x
  2. Step 2: Convert to fraction form
    279,865.80/419,798.70 = 256,246.20/x
  3. Step 3: Cross multiply
    279,865.80x = 419,798.70 × 256,246.20
  4. Step 4: Simplify right side
    279,865.80x = 107,571,821,639.94
  5. Step 5: Solve for x
    x = 107,571,821,639.94/279,865.80
  6. Step 6: Final answer
    x = 384,369.30

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