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Finding the Fourth Proportional to 276,698.13, 381,844.77 and 155,841.78

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Solution

The fourth proportional to 276,698.13, 381,844.77 and 155,841.78 is: 215,062.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,698.13 : 381,844.77 = 155,841.78 : x
  2. Step 2: Convert to fraction form
    276,698.13/381,844.77 = 155,841.78/x
  3. Step 3: Cross multiply
    276,698.13x = 381,844.77 × 155,841.78
  4. Step 4: Simplify right side
    276,698.13x = 59,507,368,640.49
  5. Step 5: Solve for x
    x = 59,507,368,640.49/276,698.13
  6. Step 6: Final answer
    x = 215,062.42

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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.