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Finding the Fourth Proportional to 276,557.69, 381,620.40 and 155,696.78

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Solution

The fourth proportional to 276,557.69, 381,620.40 and 155,696.78 is: 214,845.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,557.69 : 381,620.40 = 155,696.78 : x
  2. Step 2: Convert to fraction form
    276,557.69/381,620.40 = 155,696.78/x
  3. Step 3: Cross multiply
    276,557.69x = 381,620.40 × 155,696.78
  4. Step 4: Simplify right side
    276,557.69x = 59,417,067,462.31
  5. Step 5: Solve for x
    x = 59,417,067,462.31/276,557.69
  6. Step 6: Final answer
    x = 214,845.11

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1.5x scale

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.