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Finding the Third Proportional to 2,190 and 2,712

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Solution

The third proportional to 2,190 and 2,712 is: 3,358.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190 : 2,712 = 2,712 : x
  2. Step 2: Convert to fraction form
    2,190/2,712 = 2,712/x
  3. Step 3: Cross multiply
    2,190x = 2,712 × 2,712
  4. Step 4: Simplify right side
    2,190x = 7,354,944
  5. Step 5: Solve for x
    x = 7,354,944/2,190
  6. Step 6: Final answer
    x = 3,358.42

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Why These Related Problems?

These problems maintain the same ratio (1.24) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.