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Finding the Third Proportional to 1,990.13 and 4,781.25

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Solution

The third proportional to 1,990.13 and 4,781.25 is: 11,486.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.13 : 4,781.25 = 4,781.25 : x
  2. Step 2: Convert to fraction form
    1,990.13/4,781.25 = 4,781.25/x
  3. Step 3: Cross multiply
    1,990.13x = 4,781.25 × 4,781.25
  4. Step 4: Simplify right side
    1,990.13x = 22,860,351.56
  5. Step 5: Solve for x
    x = 22,860,351.56/1,990.13
  6. Step 6: Final answer
    x = 11,486.89

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Why These Related Problems?

These problems maintain the same ratio (2.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.