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Finding the Third Proportional to 2,158 and 4,190

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Solution

The third proportional to 2,158 and 4,190 is: 8,135.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158 : 4,190 = 4,190 : x
  2. Step 2: Convert to fraction form
    2,158/4,190 = 4,190/x
  3. Step 3: Cross multiply
    2,158x = 4,190 × 4,190
  4. Step 4: Simplify right side
    2,158x = 17,556,100
  5. Step 5: Solve for x
    x = 17,556,100/2,158
  6. Step 6: Final answer
    x = 8,135.36

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Why These Related Problems?

These problems maintain the same ratio (1.94) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.