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Finding the Fourth Proportional to 396,858.87, 547,664.82 and 215,570.94

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Solution

The fourth proportional to 396,858.87, 547,664.82 and 215,570.94 is: 297,487.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,858.87 : 547,664.82 = 215,570.94 : x
  2. Step 2: Convert to fraction form
    396,858.87/547,664.82 = 215,570.94/x
  3. Step 3: Cross multiply
    396,858.87x = 547,664.82 × 215,570.94
  4. Step 4: Simplify right side
    396,858.87x = 118,060,618,974.48
  5. Step 5: Solve for x
    x = 118,060,618,974.48/396,858.87
  6. Step 6: Final answer
    x = 297,487.67

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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.