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Finding the Fourth Proportional to 274.82, 379.62 and 255.38

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Solution

The fourth proportional to 274.82, 379.62 and 255.38 is: 352.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.82 : 379.62 = 255.38 : x
  2. Step 2: Convert to fraction form
    274.82/379.62 = 255.38/x
  3. Step 3: Cross multiply
    274.82x = 379.62 × 255.38
  4. Step 4: Simplify right side
    274.82x = 96,947.36
  5. Step 5: Solve for x
    x = 96,947.36/274.82
  6. Step 6: Final answer
    x = 352.77

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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.