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Finding the Fourth Proportional to 274.17, 378.21 and 196.59

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Solution

The fourth proportional to 274.17, 378.21 and 196.59 is: 271.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.17 : 378.21 = 196.59 : x
  2. Step 2: Convert to fraction form
    274.17/378.21 = 196.59/x
  3. Step 3: Cross multiply
    274.17x = 378.21 × 196.59
  4. Step 4: Simplify right side
    274.17x = 74,352.30
  5. Step 5: Solve for x
    x = 74,352.30/274.17
  6. Step 6: Final answer
    x = 271.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.