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Finding the Third Proportional to 3,916 and 4,312

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Solution

The third proportional to 3,916 and 4,312 is: 4,748.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916 : 4,312 = 4,312 : x
  2. Step 2: Convert to fraction form
    3,916/4,312 = 4,312/x
  3. Step 3: Cross multiply
    3,916x = 4,312 × 4,312
  4. Step 4: Simplify right side
    3,916x = 18,593,344
  5. Step 5: Solve for x
    x = 18,593,344/3,916
  6. Step 6: Final answer
    x = 4,748.04

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.