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Finding the Fourth Proportional to 919,873.32, 1,380,039.62 and 320,843.09

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Solution

The fourth proportional to 919,873.32, 1,380,039.62 and 320,843.09 is: 481,344.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,873.32 : 1,380,039.62 = 320,843.09 : x
  2. Step 2: Convert to fraction form
    919,873.32/1,380,039.62 = 320,843.09/x
  3. Step 3: Cross multiply
    919,873.32x = 1,380,039.62 × 320,843.09
  4. Step 4: Simplify right side
    919,873.32x = 442,776,167,498.81
  5. Step 5: Solve for x
    x = 442,776,167,498.81/919,873.32
  6. Step 6: Final answer
    x = 481,344.72

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