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Finding the Third Proportional to 2,815 and 4,340

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Solution

The third proportional to 2,815 and 4,340 is: 6,691.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815 : 4,340 = 4,340 : x
  2. Step 2: Convert to fraction form
    2,815/4,340 = 4,340/x
  3. Step 3: Cross multiply
    2,815x = 4,340 × 4,340
  4. Step 4: Simplify right side
    2,815x = 18,835,600
  5. Step 5: Solve for x
    x = 18,835,600/2,815
  6. Step 6: Final answer
    x = 6,691.15

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.