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Finding the Fourth Proportional to 282, 389.20 and 219.72

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Solution

The fourth proportional to 282, 389.20 and 219.72 is: 303.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    282 : 389.20 = 219.72 : x
  2. Step 2: Convert to fraction form
    282/389.20 = 219.72/x
  3. Step 3: Cross multiply
    282x = 389.20 × 219.72
  4. Step 4: Simplify right side
    282x = 85,515.02
  5. Step 5: Solve for x
    x = 85,515.02/282
  6. Step 6: Final answer
    x = 303.24

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