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Finding the Third Proportional to 5,611 and 6,211

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Solution

The third proportional to 5,611 and 6,211 is: 6,875.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,611 : 6,211 = 6,211 : x
  2. Step 2: Convert to fraction form
    5,611/6,211 = 6,211/x
  3. Step 3: Cross multiply
    5,611x = 6,211 × 6,211
  4. Step 4: Simplify right side
    5,611x = 38,576,521
  5. Step 5: Solve for x
    x = 38,576,521/5,611
  6. Step 6: Final answer
    x = 6,875.16

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.