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Finding the Fourth Proportional to 274.72, 378.84 and 197.20

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Solution

The fourth proportional to 274.72, 378.84 and 197.20 is: 271.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.72 : 378.84 = 197.20 : x
  2. Step 2: Convert to fraction form
    274.72/378.84 = 197.20/x
  3. Step 3: Cross multiply
    274.72x = 378.84 × 197.20
  4. Step 4: Simplify right side
    274.72x = 74,707.25
  5. Step 5: Solve for x
    x = 74,707.25/274.72
  6. Step 6: Final answer
    x = 271.94

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