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Finding the Third Proportional to 4,656 and 7,212

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Solution

The third proportional to 4,656 and 7,212 is: 11,171.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,656 : 7,212 = 7,212 : x
  2. Step 2: Convert to fraction form
    4,656/7,212 = 7,212/x
  3. Step 3: Cross multiply
    4,656x = 7,212 × 7,212
  4. Step 4: Simplify right side
    4,656x = 52,012,944
  5. Step 5: Solve for x
    x = 52,012,944/4,656
  6. Step 6: Final answer
    x = 11,171.16

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.