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Finding the Fourth Proportional to 381,203.86, 571,660.46 and 128,416.54

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Solution

The fourth proportional to 381,203.86, 571,660.46 and 128,416.54 is: 192,575.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,203.86 : 571,660.46 = 128,416.54 : x
  2. Step 2: Convert to fraction form
    381,203.86/571,660.46 = 128,416.54/x
  3. Step 3: Cross multiply
    381,203.86x = 571,660.46 × 128,416.54
  4. Step 4: Simplify right side
    381,203.86x = 73,410,658,328.01
  5. Step 5: Solve for x
    x = 73,410,658,328.01/381,203.86
  6. Step 6: Final answer
    x = 192,575.85

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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.