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Finding the Third Proportional to 1,990.13 and 4,071.38

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Solution

The third proportional to 1,990.13 and 4,071.38 is: 8,329.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.13 : 4,071.38 = 4,071.38 : x
  2. Step 2: Convert to fraction form
    1,990.13/4,071.38 = 4,071.38/x
  3. Step 3: Cross multiply
    1,990.13x = 4,071.38 × 4,071.38
  4. Step 4: Simplify right side
    1,990.13x = 16,576,094.39
  5. Step 5: Solve for x
    x = 16,576,094.39/1,990.13
  6. Step 6: Final answer
    x = 8,329.17

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.