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Finding the Fourth Proportional to 381,930.64, 527,079.24 and 261,324.88

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Solution

The fourth proportional to 381,930.64, 527,079.24 and 261,324.88 is: 360,638.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,930.64 : 527,079.24 = 261,324.88 : x
  2. Step 2: Convert to fraction form
    381,930.64/527,079.24 = 261,324.88/x
  3. Step 3: Cross multiply
    381,930.64x = 527,079.24 × 261,324.88
  4. Step 4: Simplify right side
    381,930.64x = 137,738,919,143.49
  5. Step 5: Solve for x
    x = 137,738,919,143.49/381,930.64
  6. Step 6: Final answer
    x = 360,638.57

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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.