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Finding the Third Proportional to 329.91 and 708.47

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Solution

The third proportional to 329.91 and 708.47 is: 1,521.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.91 : 708.47 = 708.47 : x
  2. Step 2: Convert to fraction form
    329.91/708.47 = 708.47/x
  3. Step 3: Cross multiply
    329.91x = 708.47 × 708.47
  4. Step 4: Simplify right side
    329.91x = 501,927.97
  5. Step 5: Solve for x
    x = 501,927.97/329.91
  6. Step 6: Final answer
    x = 1,521.43

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.