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Finding the Third Proportional to 3,170.78 and 4,928.76

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Solution

The third proportional to 3,170.78 and 4,928.76 is: 7,661.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,170.78 : 4,928.76 = 4,928.76 : x
  2. Step 2: Convert to fraction form
    3,170.78/4,928.76 = 4,928.76/x
  3. Step 3: Cross multiply
    3,170.78x = 4,928.76 × 4,928.76
  4. Step 4: Simplify right side
    3,170.78x = 24,292,665.61
  5. Step 5: Solve for x
    x = 24,292,665.61/3,170.78
  6. Step 6: Final answer
    x = 7,661.43

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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.