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Finding the Fourth Proportional to 276,261.54, 381,274.65 and 155,407.92

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Solution

The fourth proportional to 276,261.54, 381,274.65 and 155,407.92 is: 214,481.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,261.54 : 381,274.65 = 155,407.92 : x
  2. Step 2: Convert to fraction form
    276,261.54/381,274.65 = 155,407.92/x
  3. Step 3: Cross multiply
    276,261.54x = 381,274.65 × 155,407.92
  4. Step 4: Simplify right side
    276,261.54x = 59,253,100,305.23
  5. Step 5: Solve for x
    x = 59,253,100,305.23/276,261.54
  6. Step 6: Final answer
    x = 214,481.90

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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.