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Finding the Third Proportional to 215.50 and 450

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Solution

The third proportional to 215.50 and 450 is: 939.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    215.50 : 450 = 450 : x
  2. Step 2: Convert to fraction form
    215.50/450 = 450/x
  3. Step 3: Cross multiply
    215.50x = 450 × 450
  4. Step 4: Simplify right side
    215.50x = 202,500
  5. Step 5: Solve for x
    x = 202,500/215.50
  6. Step 6: Final answer
    x = 939.68

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.