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Finding the Third Proportional to 393 and 450

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Solution

The third proportional to 393 and 450 is: 515.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    393 : 450 = 450 : x
  2. Step 2: Convert to fraction form
    393/450 = 450/x
  3. Step 3: Cross multiply
    393x = 450 × 450
  4. Step 4: Simplify right side
    393x = 202,500
  5. Step 5: Solve for x
    x = 202,500/393
  6. Step 6: Final answer
    x = 515.27

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.