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Finding the Fourth Proportional to 221, 304.98 and 143.54

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Solution

The fourth proportional to 221, 304.98 and 143.54 is: 198.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    221 : 304.98 = 143.54 : x
  2. Step 2: Convert to fraction form
    221/304.98 = 143.54/x
  3. Step 3: Cross multiply
    221x = 304.98 × 143.54
  4. Step 4: Simplify right side
    221x = 43,776.83
  5. Step 5: Solve for x
    x = 43,776.83/221
  6. Step 6: Final answer
    x = 198.09

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