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Finding the Third Proportional to 1,310 and 2,870

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Solution

The third proportional to 1,310 and 2,870 is: 6,287.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310 : 2,870 = 2,870 : x
  2. Step 2: Convert to fraction form
    1,310/2,870 = 2,870/x
  3. Step 3: Cross multiply
    1,310x = 2,870 × 2,870
  4. Step 4: Simplify right side
    1,310x = 8,236,900
  5. Step 5: Solve for x
    x = 8,236,900/1,310
  6. Step 6: Final answer
    x = 6,287.71

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.