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Finding the Fourth Proportional to 381,425.28, 526,391.49 and 211,659.39

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Solution

The fourth proportional to 381,425.28, 526,391.49 and 211,659.39 is: 292,103.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,425.28 : 526,391.49 = 211,659.39 : x
  2. Step 2: Convert to fraction form
    381,425.28/526,391.49 = 211,659.39/x
  3. Step 3: Cross multiply
    381,425.28x = 526,391.49 × 211,659.39
  4. Step 4: Simplify right side
    381,425.28x = 111,415,701,674.59
  5. Step 5: Solve for x
    x = 111,415,701,674.59/381,425.28
  6. Step 6: Final answer
    x = 292,103.61

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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.