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Finding the Third Proportional to 815 and 1,711

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Solution

The third proportional to 815 and 1,711 is: 3,592.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    815 : 1,711 = 1,711 : x
  2. Step 2: Convert to fraction form
    815/1,711 = 1,711/x
  3. Step 3: Cross multiply
    815x = 1,711 × 1,711
  4. Step 4: Simplify right side
    815x = 2,927,521
  5. Step 5: Solve for x
    x = 2,927,521/815
  6. Step 6: Final answer
    x = 3,592.05

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.