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Finding the Fourth Proportional to 396,793.88, 547,579.57 and 215,509.35

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Solution

The fourth proportional to 396,793.88, 547,579.57 and 215,509.35 is: 297,405.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,793.88 : 547,579.57 = 215,509.35 : x
  2. Step 2: Convert to fraction form
    396,793.88/547,579.57 = 215,509.35/x
  3. Step 3: Cross multiply
    396,793.88x = 547,579.57 × 215,509.35
  4. Step 4: Simplify right side
    396,793.88x = 118,008,516,665.21
  5. Step 5: Solve for x
    x = 118,008,516,665.21/396,793.88
  6. Step 6: Final answer
    x = 297,405.09

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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.