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Finding the Fourth Proportional to 3,790, 5,229.84 and 2,111.12

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Solution

The fourth proportional to 3,790, 5,229.84 and 2,111.12 is: 2,913.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,790 : 5,229.84 = 2,111.12 : x
  2. Step 2: Convert to fraction form
    3,790/5,229.84 = 2,111.12/x
  3. Step 3: Cross multiply
    3,790x = 5,229.84 × 2,111.12
  4. Step 4: Simplify right side
    3,790x = 11,040,819.82
  5. Step 5: Solve for x
    x = 11,040,819.82/3,790
  6. Step 6: Final answer
    x = 2,913.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.