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Finding the Fourth Proportional to 276,154.77, 381,049.11 and 155,288.85

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Solution

The fourth proportional to 276,154.77, 381,049.11 and 155,288.85 is: 214,273.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,154.77 : 381,049.11 = 155,288.85 : x
  2. Step 2: Convert to fraction form
    276,154.77/381,049.11 = 155,288.85/x
  3. Step 3: Cross multiply
    276,154.77x = 381,049.11 × 155,288.85
  4. Step 4: Simplify right side
    276,154.77x = 59,172,676,656.49
  5. Step 5: Solve for x
    x = 59,172,676,656.49/276,154.77
  6. Step 6: Final answer
    x = 214,273.60

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1.5x scale

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.