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Finding the Third Proportional to 3,117 and 6,321

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Solution

The third proportional to 3,117 and 6,321 is: 12,818.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117 : 6,321 = 6,321 : x
  2. Step 2: Convert to fraction form
    3,117/6,321 = 6,321/x
  3. Step 3: Cross multiply
    3,117x = 6,321 × 6,321
  4. Step 4: Simplify right side
    3,117x = 39,955,041
  5. Step 5: Solve for x
    x = 39,955,041/3,117
  6. Step 6: Final answer
    x = 12,818.43

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.