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Finding the Fourth Proportional to 276,311.91, 381,283.30 and 155,450.60

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Solution

The fourth proportional to 276,311.91, 381,283.30 and 155,450.60 is: 214,506.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,311.91 : 381,283.30 = 155,450.60 : x
  2. Step 2: Convert to fraction form
    276,311.91/381,283.30 = 155,450.60/x
  3. Step 3: Cross multiply
    276,311.91x = 381,283.30 × 155,450.60
  4. Step 4: Simplify right side
    276,311.91x = 59,270,717,754.98
  5. Step 5: Solve for x
    x = 59,270,717,754.98/276,311.91
  6. Step 6: Final answer
    x = 214,506.56

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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.