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Finding the Third Proportional to 6,988.78 and 7,629.19

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Solution

The third proportional to 6,988.78 and 7,629.19 is: 8,328.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,988.78 : 7,629.19 = 7,629.19 : x
  2. Step 2: Convert to fraction form
    6,988.78/7,629.19 = 7,629.19/x
  3. Step 3: Cross multiply
    6,988.78x = 7,629.19 × 7,629.19
  4. Step 4: Simplify right side
    6,988.78x = 58,204,501.91
  5. Step 5: Solve for x
    x = 58,204,501.91/6,988.78
  6. Step 6: Final answer
    x = 8,328.28

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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.