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Finding the Fourth Proportional to 274.99, 379.39 and 196.32

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Solution

The fourth proportional to 274.99, 379.39 and 196.32 is: 270.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.99 : 379.39 = 196.32 : x
  2. Step 2: Convert to fraction form
    274.99/379.39 = 196.32/x
  3. Step 3: Cross multiply
    274.99x = 379.39 × 196.32
  4. Step 4: Simplify right side
    274.99x = 74,481.84
  5. Step 5: Solve for x
    x = 74,481.84/274.99
  6. Step 6: Final answer
    x = 270.85

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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.