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Finding the Third Proportional to 297.21 and 449.72

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Solution

The third proportional to 297.21 and 449.72 is: 680.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.21 : 449.72 = 449.72 : x
  2. Step 2: Convert to fraction form
    297.21/449.72 = 449.72/x
  3. Step 3: Cross multiply
    297.21x = 449.72 × 449.72
  4. Step 4: Simplify right side
    297.21x = 202,246.95
  5. Step 5: Solve for x
    x = 202,246.95/297.21
  6. Step 6: Final answer
    x = 680.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.