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Finding the Third Proportional to 4,622 and 7,770

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Solution

The third proportional to 4,622 and 7,770 is: 13,062.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,622 : 7,770 = 7,770 : x
  2. Step 2: Convert to fraction form
    4,622/7,770 = 7,770/x
  3. Step 3: Cross multiply
    4,622x = 7,770 × 7,770
  4. Step 4: Simplify right side
    4,622x = 60,372,900
  5. Step 5: Solve for x
    x = 60,372,900/4,622
  6. Step 6: Final answer
    x = 13,062.07

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Why These Related Problems?

These problems maintain the same ratio (1.68) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.