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Finding the Fourth Proportional to 396,495.87, 547,149.63 and 215,203.89

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Solution

The fourth proportional to 396,495.87, 547,149.63 and 215,203.89 is: 296,973.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,495.87 : 547,149.63 = 215,203.89 : x
  2. Step 2: Convert to fraction form
    396,495.87/547,149.63 = 215,203.89/x
  3. Step 3: Cross multiply
    396,495.87x = 547,149.63 × 215,203.89
  4. Step 4: Simplify right side
    396,495.87x = 117,748,728,788.06
  5. Step 5: Solve for x
    x = 117,748,728,788.06/396,495.87
  6. Step 6: Final answer
    x = 296,973.41

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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.