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Finding the Third Proportional to 2,878 and 7,039

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Solution

The third proportional to 2,878 and 7,039 is: 17,215.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878 : 7,039 = 7,039 : x
  2. Step 2: Convert to fraction form
    2,878/7,039 = 7,039/x
  3. Step 3: Cross multiply
    2,878x = 7,039 × 7,039
  4. Step 4: Simplify right side
    2,878x = 49,547,521
  5. Step 5: Solve for x
    x = 49,547,521/2,878
  6. Step 6: Final answer
    x = 17,215.96

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Why These Related Problems?

These problems maintain the same ratio (2.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.