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Finding the Fourth Proportional to 397,326, 548,309.88 and 218,478

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Solution

The fourth proportional to 397,326, 548,309.88 and 218,478 is: 301,499.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,326 : 548,309.88 = 218,478 : x
  2. Step 2: Convert to fraction form
    397,326/548,309.88 = 218,478/x
  3. Step 3: Cross multiply
    397,326x = 548,309.88 × 218,478
  4. Step 4: Simplify right side
    397,326x = 119,793,645,962.64
  5. Step 5: Solve for x
    x = 119,793,645,962.64/397,326
  6. Step 6: Final answer
    x = 301,499.64

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