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Finding the Third Proportional to 309.94 and 413.44

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Solution

The third proportional to 309.94 and 413.44 is: 551.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.94 : 413.44 = 413.44 : x
  2. Step 2: Convert to fraction form
    309.94/413.44 = 413.44/x
  3. Step 3: Cross multiply
    309.94x = 413.44 × 413.44
  4. Step 4: Simplify right side
    309.94x = 170,930.57
  5. Step 5: Solve for x
    x = 170,930.57/309.94
  6. Step 6: Final answer
    x = 551.50

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.