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Finding the Third Proportional to 253.76 and 327.80

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Solution

The third proportional to 253.76 and 327.80 is: 423.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.76 : 327.80 = 327.80 : x
  2. Step 2: Convert to fraction form
    253.76/327.80 = 327.80/x
  3. Step 3: Cross multiply
    253.76x = 327.80 × 327.80
  4. Step 4: Simplify right side
    253.76x = 107,450.79
  5. Step 5: Solve for x
    x = 107,450.79/253.76
  6. Step 6: Final answer
    x = 423.44

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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.