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Finding the Fourth Proportional to 398.61, 550.07 and 223.96

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Solution

The fourth proportional to 398.61, 550.07 and 223.96 is: 309.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.61 : 550.07 = 223.96 : x
  2. Step 2: Convert to fraction form
    398.61/550.07 = 223.96/x
  3. Step 3: Cross multiply
    398.61x = 550.07 × 223.96
  4. Step 4: Simplify right side
    398.61x = 123,192.56
  5. Step 5: Solve for x
    x = 123,192.56/398.61
  6. Step 6: Final answer
    x = 309.06

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