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Finding the Third Proportional to 225 and 321

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Solution

The third proportional to 225 and 321 is: 457.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    225 : 321 = 321 : x
  2. Step 2: Convert to fraction form
    225/321 = 321/x
  3. Step 3: Cross multiply
    225x = 321 × 321
  4. Step 4: Simplify right side
    225x = 103,041
  5. Step 5: Solve for x
    x = 103,041/225
  6. Step 6: Final answer
    x = 457.96

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.