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Finding the Fourth Proportional to 396,889.80, 547,717.80 and 215,601.72

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Solution

The fourth proportional to 396,889.80, 547,717.80 and 215,601.72 is: 297,535.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,889.80 : 547,717.80 = 215,601.72 : x
  2. Step 2: Convert to fraction form
    396,889.80/547,717.80 = 215,601.72/x
  3. Step 3: Cross multiply
    396,889.80x = 547,717.80 × 215,601.72
  4. Step 4: Simplify right side
    396,889.80x = 118,088,899,754.62
  5. Step 5: Solve for x
    x = 118,088,899,754.62/396,889.80
  6. Step 6: Final answer
    x = 297,535.74

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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.