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Finding the Third Proportional to 4,989 and 5,529

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Solution

The third proportional to 4,989 and 5,529 is: 6,127.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989 : 5,529 = 5,529 : x
  2. Step 2: Convert to fraction form
    4,989/5,529 = 5,529/x
  3. Step 3: Cross multiply
    4,989x = 5,529 × 5,529
  4. Step 4: Simplify right side
    4,989x = 30,569,841
  5. Step 5: Solve for x
    x = 30,569,841/4,989
  6. Step 6: Final answer
    x = 6,127.45

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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.