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Finding the Fourth Proportional to 396,503.73, 547,175.64 and 215,215.67

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Solution

The fourth proportional to 396,503.73, 547,175.64 and 215,215.67 is: 296,997.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,503.73 : 547,175.64 = 215,215.67 : x
  2. Step 2: Convert to fraction form
    396,503.73/547,175.64 = 215,215.67/x
  3. Step 3: Cross multiply
    396,503.73x = 547,175.64 × 215,215.67
  4. Step 4: Simplify right side
    396,503.73x = 117,760,769,234.40
  5. Step 5: Solve for x
    x = 117,760,769,234.40/396,503.73
  6. Step 6: Final answer
    x = 296,997.89

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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.