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Finding the Fourth Proportional to 396,477.09, 547,138.89 and 215,188.97

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Solution

The fourth proportional to 396,477.09, 547,138.89 and 215,188.97 is: 296,961.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,477.09 : 547,138.89 = 215,188.97 : x
  2. Step 2: Convert to fraction form
    396,477.09/547,138.89 = 215,188.97/x
  3. Step 3: Cross multiply
    396,477.09x = 547,138.89 × 215,188.97
  4. Step 4: Simplify right side
    396,477.09x = 117,738,251,450.35
  5. Step 5: Solve for x
    x = 117,738,251,450.35/396,477.09
  6. Step 6: Final answer
    x = 296,961.05

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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.