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Finding the Third Proportional to 1,780 and 2,310

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Solution

The third proportional to 1,780 and 2,310 is: 2,997.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780 : 2,310 = 2,310 : x
  2. Step 2: Convert to fraction form
    1,780/2,310 = 2,310/x
  3. Step 3: Cross multiply
    1,780x = 2,310 × 2,310
  4. Step 4: Simplify right side
    1,780x = 5,336,100
  5. Step 5: Solve for x
    x = 5,336,100/1,780
  6. Step 6: Final answer
    x = 2,997.81

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.