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Finding the Third Proportional to 4,611.09 and 6,921.28

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Solution

The third proportional to 4,611.09 and 6,921.28 is: 10,388.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,611.09 : 6,921.28 = 6,921.28 : x
  2. Step 2: Convert to fraction form
    4,611.09/6,921.28 = 6,921.28/x
  3. Step 3: Cross multiply
    4,611.09x = 6,921.28 × 6,921.28
  4. Step 4: Simplify right side
    4,611.09x = 47,904,134.14
  5. Step 5: Solve for x
    x = 47,904,134.14/4,611.09
  6. Step 6: Final answer
    x = 10,388.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.