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Finding the Fourth Proportional to 303.28, 455.12 and 140.97

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Solution

The fourth proportional to 303.28, 455.12 and 140.97 is: 211.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.28 : 455.12 = 140.97 : x
  2. Step 2: Convert to fraction form
    303.28/455.12 = 140.97/x
  3. Step 3: Cross multiply
    303.28x = 455.12 × 140.97
  4. Step 4: Simplify right side
    303.28x = 64,159.80
  5. Step 5: Solve for x
    x = 64,159.80/303.28
  6. Step 6: Final answer
    x = 211.55

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