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Finding the Third Proportional to 1,225.76 and 2,806.21

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Solution

The third proportional to 1,225.76 and 2,806.21 is: 6,424.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.76 : 2,806.21 = 2,806.21 : x
  2. Step 2: Convert to fraction form
    1,225.76/2,806.21 = 2,806.21/x
  3. Step 3: Cross multiply
    1,225.76x = 2,806.21 × 2,806.21
  4. Step 4: Simplify right side
    1,225.76x = 7,874,797.90
  5. Step 5: Solve for x
    x = 7,874,797.90/1,225.76
  6. Step 6: Final answer
    x = 6,424.43

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Why These Related Problems?

These problems maintain the same ratio (2.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.