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Finding the Third Proportional to 4,812 and 7,281

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Solution

The third proportional to 4,812 and 7,281 is: 11,016.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,812 : 7,281 = 7,281 : x
  2. Step 2: Convert to fraction form
    4,812/7,281 = 7,281/x
  3. Step 3: Cross multiply
    4,812x = 7,281 × 7,281
  4. Step 4: Simplify right side
    4,812x = 53,012,961
  5. Step 5: Solve for x
    x = 53,012,961/4,812
  6. Step 6: Final answer
    x = 11,016.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.