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Finding the Fourth Proportional to 308.37, 426.15 and 275.97

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Solution

The fourth proportional to 308.37, 426.15 and 275.97 is: 381.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.37 : 426.15 = 275.97 : x
  2. Step 2: Convert to fraction form
    308.37/426.15 = 275.97/x
  3. Step 3: Cross multiply
    308.37x = 426.15 × 275.97
  4. Step 4: Simplify right side
    308.37x = 117,604.62
  5. Step 5: Solve for x
    x = 117,604.62/308.37
  6. Step 6: Final answer
    x = 381.38

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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.