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Finding the Fourth Proportional to 276,391.49, 381,415.79 and 155,532.71

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Solution

The fourth proportional to 276,391.49, 381,415.79 and 155,532.71 is: 214,632.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,391.49 : 381,415.79 = 155,532.71 : x
  2. Step 2: Convert to fraction form
    276,391.49/381,415.79 = 155,532.71/x
  3. Step 3: Cross multiply
    276,391.49x = 381,415.79 × 155,532.71
  4. Step 4: Simplify right side
    276,391.49x = 59,322,632,797.86
  5. Step 5: Solve for x
    x = 59,322,632,797.86/276,391.49
  6. Step 6: Final answer
    x = 214,632.63

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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.