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Finding the Fourth Proportional to 396,794.16, 547,579.89 and 215,509.63

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Solution

The fourth proportional to 396,794.16, 547,579.89 and 215,509.63 is: 297,405.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,794.16 : 547,579.89 = 215,509.63 : x
  2. Step 2: Convert to fraction form
    396,794.16/547,579.89 = 215,509.63/x
  3. Step 3: Cross multiply
    396,794.16x = 547,579.89 × 215,509.63
  4. Step 4: Simplify right side
    396,794.16x = 118,008,738,120.39
  5. Step 5: Solve for x
    x = 118,008,738,120.39/396,794.16
  6. Step 6: Final answer
    x = 297,405.43

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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.