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Finding the Fourth Proportional to 276,805.72, 381,912.88 and 155,904.76

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Solution

The fourth proportional to 276,805.72, 381,912.88 and 155,904.76 is: 215,104.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,805.72 : 381,912.88 = 155,904.76 : x
  2. Step 2: Convert to fraction form
    276,805.72/381,912.88 = 155,904.76/x
  3. Step 3: Cross multiply
    276,805.72x = 381,912.88 × 155,904.76
  4. Step 4: Simplify right side
    276,805.72x = 59,542,035,897.31
  5. Step 5: Solve for x
    x = 59,542,035,897.31/276,805.72
  6. Step 6: Final answer
    x = 215,104.07

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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.