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Finding the Fourth Proportional to 397.81, 548.97 and 223.15

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Solution

The fourth proportional to 397.81, 548.97 and 223.15 is: 307.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.81 : 548.97 = 223.15 : x
  2. Step 2: Convert to fraction form
    397.81/548.97 = 223.15/x
  3. Step 3: Cross multiply
    397.81x = 548.97 × 223.15
  4. Step 4: Simplify right side
    397.81x = 122,502.66
  5. Step 5: Solve for x
    x = 122,502.66/397.81
  6. Step 6: Final answer
    x = 307.94

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