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Finding the Fourth Proportional to 396,504.49, 547,161.54 and 215,212.51

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Solution

The fourth proportional to 396,504.49, 547,161.54 and 215,212.51 is: 296,985.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,504.49 : 547,161.54 = 215,212.51 : x
  2. Step 2: Convert to fraction form
    396,504.49/547,161.54 = 215,212.51/x
  3. Step 3: Cross multiply
    396,504.49x = 547,161.54 × 215,212.51
  4. Step 4: Simplify right side
    396,504.49x = 117,756,008,398.87
  5. Step 5: Solve for x
    x = 117,756,008,398.87/396,504.49
  6. Step 6: Final answer
    x = 296,985.31

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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.