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Finding the Fourth Proportional to 308.89, 426.09 and 272.14

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Solution

The fourth proportional to 308.89, 426.09 and 272.14 is: 375.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.89 : 426.09 = 272.14 : x
  2. Step 2: Convert to fraction form
    308.89/426.09 = 272.14/x
  3. Step 3: Cross multiply
    308.89x = 426.09 × 272.14
  4. Step 4: Simplify right side
    308.89x = 115,956.09
  5. Step 5: Solve for x
    x = 115,956.09/308.89
  6. Step 6: Final answer
    x = 375.39

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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.