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Finding the Third Proportional to 3,145.50 and 6,919

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Solution

The third proportional to 3,145.50 and 6,919 is: 15,219.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.50 : 6,919 = 6,919 : x
  2. Step 2: Convert to fraction form
    3,145.50/6,919 = 6,919/x
  3. Step 3: Cross multiply
    3,145.50x = 6,919 × 6,919
  4. Step 4: Simplify right side
    3,145.50x = 47,872,561
  5. Step 5: Solve for x
    x = 47,872,561/3,145.50
  6. Step 6: Final answer
    x = 15,219.38

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.