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Finding the Fourth Proportional to 396,486.56, 547,145.82 and 215,193.84

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Solution

The fourth proportional to 396,486.56, 547,145.82 and 215,193.84 is: 296,964.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,486.56 : 547,145.82 = 215,193.84 : x
  2. Step 2: Convert to fraction form
    396,486.56/547,145.82 = 215,193.84/x
  3. Step 3: Cross multiply
    396,486.56x = 547,145.82 × 215,193.84
  4. Step 4: Simplify right side
    396,486.56x = 117,742,410,045.75
  5. Step 5: Solve for x
    x = 117,742,410,045.75/396,486.56
  6. Step 6: Final answer
    x = 296,964.44

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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.