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Finding the Fourth Proportional to 626.27, 939.38 and 261.09

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Solution

The fourth proportional to 626.27, 939.38 and 261.09 is: 391.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.27 : 939.38 = 261.09 : x
  2. Step 2: Convert to fraction form
    626.27/939.38 = 261.09/x
  3. Step 3: Cross multiply
    626.27x = 939.38 × 261.09
  4. Step 4: Simplify right side
    626.27x = 245,261.42
  5. Step 5: Solve for x
    x = 245,261.42/626.27
  6. Step 6: Final answer
    x = 391.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.