Home / 3,781.45-5,218.65-2,289.43

Finding the Fourth Proportional to 3,781.45, 5,218.65 and 2,289.43

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Solution

The fourth proportional to 3,781.45, 5,218.65 and 2,289.43 is: 3,159.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.45 : 5,218.65 = 2,289.43 : x
  2. Step 2: Convert to fraction form
    3,781.45/5,218.65 = 2,289.43/x
  3. Step 3: Cross multiply
    3,781.45x = 5,218.65 × 2,289.43
  4. Step 4: Simplify right side
    3,781.45x = 11,947,733.87
  5. Step 5: Solve for x
    x = 11,947,733.87/3,781.45
  6. Step 6: Final answer
    x = 3,159.56

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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.