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Finding the Third Proportional to 7,208.50 and 9,211

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Solution

The third proportional to 7,208.50 and 9,211 is: 11,769.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,208.50 : 9,211 = 9,211 : x
  2. Step 2: Convert to fraction form
    7,208.50/9,211 = 9,211/x
  3. Step 3: Cross multiply
    7,208.50x = 9,211 × 9,211
  4. Step 4: Simplify right side
    7,208.50x = 84,842,521
  5. Step 5: Solve for x
    x = 84,842,521/7,208.50
  6. Step 6: Final answer
    x = 11,769.79

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.