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Finding the Third Proportional to 1,990.50 and 5,187

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Solution

The third proportional to 1,990.50 and 5,187 is: 13,516.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.50 : 5,187 = 5,187 : x
  2. Step 2: Convert to fraction form
    1,990.50/5,187 = 5,187/x
  3. Step 3: Cross multiply
    1,990.50x = 5,187 × 5,187
  4. Step 4: Simplify right side
    1,990.50x = 26,904,969
  5. Step 5: Solve for x
    x = 26,904,969/1,990.50
  6. Step 6: Final answer
    x = 13,516.69

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Why These Related Problems?

These problems maintain the same ratio (2.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.