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Finding the Fourth Proportional to 276,228.56, 381,229.20 and 155,374.92

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Solution

The fourth proportional to 276,228.56, 381,229.20 and 155,374.92 is: 214,436.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,228.56 : 381,229.20 = 155,374.92 : x
  2. Step 2: Convert to fraction form
    276,228.56/381,229.20 = 155,374.92/x
  3. Step 3: Cross multiply
    276,228.56x = 381,229.20 × 155,374.92
  4. Step 4: Simplify right side
    276,228.56x = 59,233,456,451.66
  5. Step 5: Solve for x
    x = 59,233,456,451.66/276,228.56
  6. Step 6: Final answer
    x = 214,436.39

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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.