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Finding the Third Proportional to 260.40 and 403.73

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Solution

The third proportional to 260.40 and 403.73 is: 625.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.40 : 403.73 = 403.73 : x
  2. Step 2: Convert to fraction form
    260.40/403.73 = 403.73/x
  3. Step 3: Cross multiply
    260.40x = 403.73 × 403.73
  4. Step 4: Simplify right side
    260.40x = 163,001.45
  5. Step 5: Solve for x
    x = 163,001.45/260.40
  6. Step 6: Final answer
    x = 625.96

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.