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Finding the Third Proportional to 2,979 and 7,641

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Solution

The third proportional to 2,979 and 7,641 is: 19,598.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979 : 7,641 = 7,641 : x
  2. Step 2: Convert to fraction form
    2,979/7,641 = 7,641/x
  3. Step 3: Cross multiply
    2,979x = 7,641 × 7,641
  4. Step 4: Simplify right side
    2,979x = 58,384,881
  5. Step 5: Solve for x
    x = 58,384,881/2,979
  6. Step 6: Final answer
    x = 19,598.82

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Why These Related Problems?

These problems maintain the same ratio (2.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.