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Finding the Third Proportional to 398.25 and 450

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Solution

The third proportional to 398.25 and 450 is: 508.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.25 : 450 = 450 : x
  2. Step 2: Convert to fraction form
    398.25/450 = 450/x
  3. Step 3: Cross multiply
    398.25x = 450 × 450
  4. Step 4: Simplify right side
    398.25x = 202,500
  5. Step 5: Solve for x
    x = 202,500/398.25
  6. Step 6: Final answer
    x = 508.47

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.