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Finding the Third Proportional to 1,990 and 3,092

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Solution

The third proportional to 1,990 and 3,092 is: 4,804.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990 : 3,092 = 3,092 : x
  2. Step 2: Convert to fraction form
    1,990/3,092 = 3,092/x
  3. Step 3: Cross multiply
    1,990x = 3,092 × 3,092
  4. Step 4: Simplify right side
    1,990x = 9,560,464
  5. Step 5: Solve for x
    x = 9,560,464/1,990
  6. Step 6: Final answer
    x = 4,804.25

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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.