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Finding the Fourth Proportional to 3,945.19, 5,919.14 and 1,755.45

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Solution

The fourth proportional to 3,945.19, 5,919.14 and 1,755.45 is: 2,633.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.19 : 5,919.14 = 1,755.45 : x
  2. Step 2: Convert to fraction form
    3,945.19/5,919.14 = 1,755.45/x
  3. Step 3: Cross multiply
    3,945.19x = 5,919.14 × 1,755.45
  4. Step 4: Simplify right side
    3,945.19x = 10,390,754.31
  5. Step 5: Solve for x
    x = 10,390,754.31/3,945.19
  6. Step 6: Final answer
    x = 2,633.78

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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.