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Finding the Fourth Proportional to 274, 378.27 and 196.51

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Solution

The fourth proportional to 274, 378.27 and 196.51 is: 271.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    274 : 378.27 = 196.51 : x
  2. Step 2: Convert to fraction form
    274/378.27 = 196.51/x
  3. Step 3: Cross multiply
    274x = 378.27 × 196.51
  4. Step 4: Simplify right side
    274x = 74,333.84
  5. Step 5: Solve for x
    x = 74,333.84/274
  6. Step 6: Final answer
    x = 271.29

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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.