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Finding the Fourth Proportional to 398,841.76, 550,403.34 and 217,557.64

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Solution

The fourth proportional to 398,841.76, 550,403.34 and 217,557.64 is: 300,230.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,841.76 : 550,403.34 = 217,557.64 : x
  2. Step 2: Convert to fraction form
    398,841.76/550,403.34 = 217,557.64/x
  3. Step 3: Cross multiply
    398,841.76x = 550,403.34 × 217,557.64
  4. Step 4: Simplify right side
    398,841.76x = 119,744,451,698.52
  5. Step 5: Solve for x
    x = 119,744,451,698.52/398,841.76
  6. Step 6: Final answer
    x = 300,230.48

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