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Finding the Third Proportional to 2,212 and 2,971.50

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Solution

The third proportional to 2,212 and 2,971.50 is: 3,991.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212 : 2,971.50 = 2,971.50 : x
  2. Step 2: Convert to fraction form
    2,212/2,971.50 = 2,971.50/x
  3. Step 3: Cross multiply
    2,212x = 2,971.50 × 2,971.50
  4. Step 4: Simplify right side
    2,212x = 8,829,812.25
  5. Step 5: Solve for x
    x = 8,829,812.25/2,212
  6. Step 6: Final answer
    x = 3,991.78

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.