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Finding the Third Proportional to 3,224 and 5,280

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Solution

The third proportional to 3,224 and 5,280 is: 8,647.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,224 : 5,280 = 5,280 : x
  2. Step 2: Convert to fraction form
    3,224/5,280 = 5,280/x
  3. Step 3: Cross multiply
    3,224x = 5,280 × 5,280
  4. Step 4: Simplify right side
    3,224x = 27,878,400
  5. Step 5: Solve for x
    x = 27,878,400/3,224
  6. Step 6: Final answer
    x = 8,647.15

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.