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Finding the Third Proportional to 721 and 1,460

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Solution

The third proportional to 721 and 1,460 is: 2,956.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    721 : 1,460 = 1,460 : x
  2. Step 2: Convert to fraction form
    721/1,460 = 1,460/x
  3. Step 3: Cross multiply
    721x = 1,460 × 1,460
  4. Step 4: Simplify right side
    721x = 2,131,600
  5. Step 5: Solve for x
    x = 2,131,600/721
  6. Step 6: Final answer
    x = 2,956.45

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Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.