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Finding the Fourth Proportional to 3,781.42, 5,672.13 and 1,833.91

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Solution

The fourth proportional to 3,781.42, 5,672.13 and 1,833.91 is: 2,750.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.42 : 5,672.13 = 1,833.91 : x
  2. Step 2: Convert to fraction form
    3,781.42/5,672.13 = 1,833.91/x
  3. Step 3: Cross multiply
    3,781.42x = 5,672.13 × 1,833.91
  4. Step 4: Simplify right side
    3,781.42x = 10,402,161.75
  5. Step 5: Solve for x
    x = 10,402,161.75/3,781.42
  6. Step 6: Final answer
    x = 2,750.86

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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.