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Finding the Fourth Proportional to 276,288.72, 381,160.61 and 158,353.38

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Solution

The fourth proportional to 276,288.72, 381,160.61 and 158,353.38 is: 218,460.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,288.72 : 381,160.61 = 158,353.38 : x
  2. Step 2: Convert to fraction form
    276,288.72/381,160.61 = 158,353.38/x
  3. Step 3: Cross multiply
    276,288.72x = 381,160.61 × 158,353.38
  4. Step 4: Simplify right side
    276,288.72x = 60,358,071,163.79
  5. Step 5: Solve for x
    x = 60,358,071,163.79/276,288.72
  6. Step 6: Final answer
    x = 218,460.13

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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.