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Finding the Third Proportional to 3,150 and 4,930

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Solution

The third proportional to 3,150 and 4,930 is: 7,715.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,150 : 4,930 = 4,930 : x
  2. Step 2: Convert to fraction form
    3,150/4,930 = 4,930/x
  3. Step 3: Cross multiply
    3,150x = 4,930 × 4,930
  4. Step 4: Simplify right side
    3,150x = 24,304,900
  5. Step 5: Solve for x
    x = 24,304,900/3,150
  6. Step 6: Final answer
    x = 7,715.84

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.