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Finding the Third Proportional to 2,661 and 4,890

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Solution

The third proportional to 2,661 and 4,890 is: 8,986.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661 : 4,890 = 4,890 : x
  2. Step 2: Convert to fraction form
    2,661/4,890 = 4,890/x
  3. Step 3: Cross multiply
    2,661x = 4,890 × 4,890
  4. Step 4: Simplify right side
    2,661x = 23,912,100
  5. Step 5: Solve for x
    x = 23,912,100/2,661
  6. Step 6: Final answer
    x = 8,986.13

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Why These Related Problems?

These problems maintain the same ratio (1.84) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.