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Finding the Third Proportional to 101.50 and 215.66

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Solution

The third proportional to 101.50 and 215.66 is: 458.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    101.50 : 215.66 = 215.66 : x
  2. Step 2: Convert to fraction form
    101.50/215.66 = 215.66/x
  3. Step 3: Cross multiply
    101.50x = 215.66 × 215.66
  4. Step 4: Simplify right side
    101.50x = 46,507.62
  5. Step 5: Solve for x
    x = 46,507.62/101.50
  6. Step 6: Final answer
    x = 458.20

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.