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Finding the Fourth Proportional to 396,898.72, 547,418.45 and 274,594.59

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Solution

The fourth proportional to 396,898.72, 547,418.45 and 274,594.59 is: 378,731.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,898.72 : 547,418.45 = 274,594.59 : x
  2. Step 2: Convert to fraction form
    396,898.72/547,418.45 = 274,594.59/x
  3. Step 3: Cross multiply
    396,898.72x = 547,418.45 × 274,594.59
  4. Step 4: Simplify right side
    396,898.72x = 150,318,145,522.67
  5. Step 5: Solve for x
    x = 150,318,145,522.67/396,898.72
  6. Step 6: Final answer
    x = 378,731.75

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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.