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Finding the Third Proportional to 3,139 and 4,865

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Solution

The third proportional to 3,139 and 4,865 is: 7,540.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139 : 4,865 = 4,865 : x
  2. Step 2: Convert to fraction form
    3,139/4,865 = 4,865/x
  3. Step 3: Cross multiply
    3,139x = 4,865 × 4,865
  4. Step 4: Simplify right side
    3,139x = 23,668,225
  5. Step 5: Solve for x
    x = 23,668,225/3,139
  6. Step 6: Final answer
    x = 7,540.05

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.