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Finding the Third Proportional to 3,129 and 4,887

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Solution

The third proportional to 3,129 and 4,887 is: 7,632.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129 : 4,887 = 4,887 : x
  2. Step 2: Convert to fraction form
    3,129/4,887 = 4,887/x
  3. Step 3: Cross multiply
    3,129x = 4,887 × 4,887
  4. Step 4: Simplify right side
    3,129x = 23,882,769
  5. Step 5: Solve for x
    x = 23,882,769/3,129
  6. Step 6: Final answer
    x = 7,632.72

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.