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Finding the Third Proportional to 6,438 and 6,998

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Solution

The third proportional to 6,438 and 6,998 is: 7,606.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438 : 6,998 = 6,998 : x
  2. Step 2: Convert to fraction form
    6,438/6,998 = 6,998/x
  3. Step 3: Cross multiply
    6,438x = 6,998 × 6,998
  4. Step 4: Simplify right side
    6,438x = 48,972,004
  5. Step 5: Solve for x
    x = 48,972,004/6,438
  6. Step 6: Final answer
    x = 7,606.71

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.