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Finding the Third Proportional to 2,019 and 4,487

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Solution

The third proportional to 2,019 and 4,487 is: 9,971.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,019 : 4,487 = 4,487 : x
  2. Step 2: Convert to fraction form
    2,019/4,487 = 4,487/x
  3. Step 3: Cross multiply
    2,019x = 4,487 × 4,487
  4. Step 4: Simplify right side
    2,019x = 20,133,169
  5. Step 5: Solve for x
    x = 20,133,169/2,019
  6. Step 6: Final answer
    x = 9,971.85

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.