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Finding the Third Proportional to 3,618 and 3,934

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Solution

The third proportional to 3,618 and 3,934 is: 4,277.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618 : 3,934 = 3,934 : x
  2. Step 2: Convert to fraction form
    3,618/3,934 = 3,934/x
  3. Step 3: Cross multiply
    3,618x = 3,934 × 3,934
  4. Step 4: Simplify right side
    3,618x = 15,476,356
  5. Step 5: Solve for x
    x = 15,476,356/3,618
  6. Step 6: Final answer
    x = 4,277.60

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.