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Finding the Third Proportional to 2,389 and 3,169

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Solution

The third proportional to 2,389 and 3,169 is: 4,203.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,389 : 3,169 = 3,169 : x
  2. Step 2: Convert to fraction form
    2,389/3,169 = 3,169/x
  3. Step 3: Cross multiply
    2,389x = 3,169 × 3,169
  4. Step 4: Simplify right side
    2,389x = 10,042,561
  5. Step 5: Solve for x
    x = 10,042,561/2,389
  6. Step 6: Final answer
    x = 4,203.67

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.