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Finding the Third Proportional to 212.63 and 273.80

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Solution

The third proportional to 212.63 and 273.80 is: 352.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.63 : 273.80 = 273.80 : x
  2. Step 2: Convert to fraction form
    212.63/273.80 = 273.80/x
  3. Step 3: Cross multiply
    212.63x = 273.80 × 273.80
  4. Step 4: Simplify right side
    212.63x = 74,964.73
  5. Step 5: Solve for x
    x = 74,964.73/212.63
  6. Step 6: Final answer
    x = 352.57

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.