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Finding the Fourth Proportional to 378,811.79, 522,826.95 and 225,859.39

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Solution

The fourth proportional to 378,811.79, 522,826.95 and 225,859.39 is: 311,725.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,811.79 : 522,826.95 = 225,859.39 : x
  2. Step 2: Convert to fraction form
    378,811.79/522,826.95 = 225,859.39/x
  3. Step 3: Cross multiply
    378,811.79x = 522,826.95 × 225,859.39
  4. Step 4: Simplify right side
    378,811.79x = 118,085,375,542.47
  5. Step 5: Solve for x
    x = 118,085,375,542.47/378,811.79
  6. Step 6: Final answer
    x = 311,725.71

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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.