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Finding the Third Proportional to 4,912 and 7,223

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Solution

The third proportional to 4,912 and 7,223 is: 10,621.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,912 : 7,223 = 7,223 : x
  2. Step 2: Convert to fraction form
    4,912/7,223 = 7,223/x
  3. Step 3: Cross multiply
    4,912x = 7,223 × 7,223
  4. Step 4: Simplify right side
    4,912x = 52,171,729
  5. Step 5: Solve for x
    x = 52,171,729/4,912
  6. Step 6: Final answer
    x = 10,621.28

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.