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Finding the Fourth Proportional to 276,803.72, 381,910.12 and 155,902.76

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Solution

The fourth proportional to 276,803.72, 381,910.12 and 155,902.76 is: 215,101.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,803.72 : 381,910.12 = 155,902.76 : x
  2. Step 2: Convert to fraction form
    276,803.72/381,910.12 = 155,902.76/x
  3. Step 3: Cross multiply
    276,803.72x = 381,910.12 × 155,902.76
  4. Step 4: Simplify right side
    276,803.72x = 59,540,841,779.93
  5. Step 5: Solve for x
    x = 59,540,841,779.93/276,803.72
  6. Step 6: Final answer
    x = 215,101.31

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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.