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Finding the Third Proportional to 329.63 and 721.13

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Solution

The third proportional to 329.63 and 721.13 is: 1,577.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.63 : 721.13 = 721.13 : x
  2. Step 2: Convert to fraction form
    329.63/721.13 = 721.13/x
  3. Step 3: Cross multiply
    329.63x = 721.13 × 721.13
  4. Step 4: Simplify right side
    329.63x = 520,021.27
  5. Step 5: Solve for x
    x = 520,021.27/329.63
  6. Step 6: Final answer
    x = 1,577.61

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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.