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Finding the Fourth Proportional to 276,367, 381,383.99 and 155,505.87

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Solution

The fourth proportional to 276,367, 381,383.99 and 155,505.87 is: 214,596.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,367 : 381,383.99 = 155,505.87 : x
  2. Step 2: Convert to fraction form
    276,367/381,383.99 = 155,505.87/x
  3. Step 3: Cross multiply
    276,367x = 381,383.99 × 155,505.87
  4. Step 4: Simplify right side
    276,367x = 59,307,449,169.02
  5. Step 5: Solve for x
    x = 59,307,449,169.02/276,367
  6. Step 6: Final answer
    x = 214,596.71

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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.