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Finding the Third Proportional to 2,957 and 6,439

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Solution

The third proportional to 2,957 and 6,439 is: 14,021.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,957 : 6,439 = 6,439 : x
  2. Step 2: Convert to fraction form
    2,957/6,439 = 6,439/x
  3. Step 3: Cross multiply
    2,957x = 6,439 × 6,439
  4. Step 4: Simplify right side
    2,957x = 41,460,721
  5. Step 5: Solve for x
    x = 41,460,721/2,957
  6. Step 6: Final answer
    x = 14,021.21

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.