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Finding the Third Proportional to 298.69 and 447.19

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Solution

The third proportional to 298.69 and 447.19 is: 669.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.69 : 447.19 = 447.19 : x
  2. Step 2: Convert to fraction form
    298.69/447.19 = 447.19/x
  3. Step 3: Cross multiply
    298.69x = 447.19 × 447.19
  4. Step 4: Simplify right side
    298.69x = 199,976.66
  5. Step 5: Solve for x
    x = 199,976.66/298.69
  6. Step 6: Final answer
    x = 669.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.