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Finding the Third Proportional to 276.94 and 413.81

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Solution

The third proportional to 276.94 and 413.81 is: 618.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.94 : 413.81 = 413.81 : x
  2. Step 2: Convert to fraction form
    276.94/413.81 = 413.81/x
  3. Step 3: Cross multiply
    276.94x = 413.81 × 413.81
  4. Step 4: Simplify right side
    276.94x = 171,240.79
  5. Step 5: Solve for x
    x = 171,240.79/276.94
  6. Step 6: Final answer
    x = 618.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.