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Finding the Fourth Proportional to 276,803.22, 381,989.61 and 155,945.97

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Solution

The fourth proportional to 276,803.22, 381,989.61 and 155,945.97 is: 215,206.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,803.22 : 381,989.61 = 155,945.97 : x
  2. Step 2: Convert to fraction form
    276,803.22/381,989.61 = 155,945.97/x
  3. Step 3: Cross multiply
    276,803.22x = 381,989.61 × 155,945.97
  4. Step 4: Simplify right side
    276,803.22x = 59,569,740,261.37
  5. Step 5: Solve for x
    x = 59,569,740,261.37/276,803.22
  6. Step 6: Final answer
    x = 215,206.10

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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.