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Finding the Third Proportional to 1,405 and 2,186

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Solution

The third proportional to 1,405 and 2,186 is: 3,401.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405 : 2,186 = 2,186 : x
  2. Step 2: Convert to fraction form
    1,405/2,186 = 2,186/x
  3. Step 3: Cross multiply
    1,405x = 2,186 × 2,186
  4. Step 4: Simplify right side
    1,405x = 4,778,596
  5. Step 5: Solve for x
    x = 4,778,596/1,405
  6. Step 6: Final answer
    x = 3,401.14

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.