Home / 3,403.86-5,105.72-1,939.90

Finding the Fourth Proportional to 3,403.86, 5,105.72 and 1,939.90

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Solution

The fourth proportional to 3,403.86, 5,105.72 and 1,939.90 is: 2,909.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,403.86 : 5,105.72 = 1,939.90 : x
  2. Step 2: Convert to fraction form
    3,403.86/5,105.72 = 1,939.90/x
  3. Step 3: Cross multiply
    3,403.86x = 5,105.72 × 1,939.90
  4. Step 4: Simplify right side
    3,403.86x = 9,904,586.23
  5. Step 5: Solve for x
    x = 9,904,586.23/3,403.86
  6. Step 6: Final answer
    x = 2,909.81

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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.