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Finding the Third Proportional to 3,172.50 and 4,939.31

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Solution

The third proportional to 3,172.50 and 4,939.31 is: 7,690.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.50 : 4,939.31 = 4,939.31 : x
  2. Step 2: Convert to fraction form
    3,172.50/4,939.31 = 4,939.31/x
  3. Step 3: Cross multiply
    3,172.50x = 4,939.31 × 4,939.31
  4. Step 4: Simplify right side
    3,172.50x = 24,396,807.97
  5. Step 5: Solve for x
    x = 24,396,807.97/3,172.50
  6. Step 6: Final answer
    x = 7,690.09

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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.