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Finding the Fourth Proportional to 3,738.78, 5,608.05 and 1,686.78

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Solution

The fourth proportional to 3,738.78, 5,608.05 and 1,686.78 is: 2,530.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,738.78 : 5,608.05 = 1,686.78 : x
  2. Step 2: Convert to fraction form
    3,738.78/5,608.05 = 1,686.78/x
  3. Step 3: Cross multiply
    3,738.78x = 5,608.05 × 1,686.78
  4. Step 4: Simplify right side
    3,738.78x = 9,459,546.58
  5. Step 5: Solve for x
    x = 9,459,546.58/3,738.78
  6. Step 6: Final answer
    x = 2,530.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.