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Finding the Fourth Proportional to 351.73, 485.37 and 220.81

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Solution

The fourth proportional to 351.73, 485.37 and 220.81 is: 304.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.73 : 485.37 = 220.81 : x
  2. Step 2: Convert to fraction form
    351.73/485.37 = 220.81/x
  3. Step 3: Cross multiply
    351.73x = 485.37 × 220.81
  4. Step 4: Simplify right side
    351.73x = 107,173.45
  5. Step 5: Solve for x
    x = 107,173.45/351.73
  6. Step 6: Final answer
    x = 304.70

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