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Finding the Fourth Proportional to 381,168.38, 571,606.77 and 128,380.85

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Solution

The fourth proportional to 381,168.38, 571,606.77 and 128,380.85 is: 192,522.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,168.38 : 571,606.77 = 128,380.85 : x
  2. Step 2: Convert to fraction form
    381,168.38/571,606.77 = 128,380.85/x
  3. Step 3: Cross multiply
    381,168.38x = 571,606.77 × 128,380.85
  4. Step 4: Simplify right side
    381,168.38x = 73,383,362,765.27
  5. Step 5: Solve for x
    x = 73,383,362,765.27/381,168.38
  6. Step 6: Final answer
    x = 192,522.17

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1.5x scale

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.