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Finding the Third Proportional to 721.41 and 1,507.36

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Solution

The third proportional to 721.41 and 1,507.36 is: 3,149.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.41 : 1,507.36 = 1,507.36 : x
  2. Step 2: Convert to fraction form
    721.41/1,507.36 = 1,507.36/x
  3. Step 3: Cross multiply
    721.41x = 1,507.36 × 1,507.36
  4. Step 4: Simplify right side
    721.41x = 2,272,132.29
  5. Step 5: Solve for x
    x = 2,272,132.29/721.41
  6. Step 6: Final answer
    x = 3,149.59

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.