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Finding the Fourth Proportional to 490,255.20, 734,859.60 and 279,439.20

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Solution

The fourth proportional to 490,255.20, 734,859.60 and 279,439.20 is: 418,860.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,255.20 : 734,859.60 = 279,439.20 : x
  2. Step 2: Convert to fraction form
    490,255.20/734,859.60 = 279,439.20/x
  3. Step 3: Cross multiply
    490,255.20x = 734,859.60 × 279,439.20
  4. Step 4: Simplify right side
    490,255.20x = 205,348,578,736.32
  5. Step 5: Solve for x
    x = 205,348,578,736.32/490,255.20
  6. Step 6: Final answer
    x = 418,860.58

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