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Finding the Third Proportional to 260.72 and 306.28

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Solution

The third proportional to 260.72 and 306.28 is: 359.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.72 : 306.28 = 306.28 : x
  2. Step 2: Convert to fraction form
    260.72/306.28 = 306.28/x
  3. Step 3: Cross multiply
    260.72x = 306.28 × 306.28
  4. Step 4: Simplify right side
    260.72x = 93,808.20
  5. Step 5: Solve for x
    x = 93,808.20/260.72
  6. Step 6: Final answer
    x = 359.81

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.