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Finding the Fourth Proportional to 396,668.73, 547,412.36 and 215,388.30

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Solution

The fourth proportional to 396,668.73, 547,412.36 and 215,388.30 is: 297,241.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,668.73 : 547,412.36 = 215,388.30 : x
  2. Step 2: Convert to fraction form
    396,668.73/547,412.36 = 215,388.30/x
  3. Step 3: Cross multiply
    396,668.73x = 547,412.36 × 215,388.30
  4. Step 4: Simplify right side
    396,668.73x = 117,906,217,619.39
  5. Step 5: Solve for x
    x = 117,906,217,619.39/396,668.73
  6. Step 6: Final answer
    x = 297,241.02

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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.