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Finding the Third Proportional to 2,990 and 6,554

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Solution

The third proportional to 2,990 and 6,554 is: 14,366.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990 : 6,554 = 6,554 : x
  2. Step 2: Convert to fraction form
    2,990/6,554 = 6,554/x
  3. Step 3: Cross multiply
    2,990x = 6,554 × 6,554
  4. Step 4: Simplify right side
    2,990x = 42,954,916
  5. Step 5: Solve for x
    x = 42,954,916/2,990
  6. Step 6: Final answer
    x = 14,366.19

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.