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Finding the Third Proportional to 3,912 and 4,712

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Solution

The third proportional to 3,912 and 4,712 is: 5,675.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912 : 4,712 = 4,712 : x
  2. Step 2: Convert to fraction form
    3,912/4,712 = 4,712/x
  3. Step 3: Cross multiply
    3,912x = 4,712 × 4,712
  4. Step 4: Simplify right side
    3,912x = 22,202,944
  5. Step 5: Solve for x
    x = 22,202,944/3,912
  6. Step 6: Final answer
    x = 5,675.60

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.