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Finding the Third Proportional to 1,862 and 4,009

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Solution

The third proportional to 1,862 and 4,009 is: 8,631.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,862 : 4,009 = 4,009 : x
  2. Step 2: Convert to fraction form
    1,862/4,009 = 4,009/x
  3. Step 3: Cross multiply
    1,862x = 4,009 × 4,009
  4. Step 4: Simplify right side
    1,862x = 16,072,081
  5. Step 5: Solve for x
    x = 16,072,081/1,862
  6. Step 6: Final answer
    x = 8,631.62

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.