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Finding the Third Proportional to 260.44 and 401.91

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Solution

The third proportional to 260.44 and 401.91 is: 620.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.44 : 401.91 = 401.91 : x
  2. Step 2: Convert to fraction form
    260.44/401.91 = 401.91/x
  3. Step 3: Cross multiply
    260.44x = 401.91 × 401.91
  4. Step 4: Simplify right side
    260.44x = 161,528.63
  5. Step 5: Solve for x
    x = 161,528.63/260.44
  6. Step 6: Final answer
    x = 620.22

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.