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Finding the Fourth Proportional to 396,504.56, 547,161.64 and 215,212.63

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Solution

The fourth proportional to 396,504.56, 547,161.64 and 215,212.63 is: 296,985.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,504.56 : 547,161.64 = 215,212.63 : x
  2. Step 2: Convert to fraction form
    396,504.56/547,161.64 = 215,212.63/x
  3. Step 3: Cross multiply
    396,504.56x = 547,161.64 × 215,212.63
  4. Step 4: Simplify right side
    396,504.56x = 117,756,095,579.51
  5. Step 5: Solve for x
    x = 117,756,095,579.51/396,504.56
  6. Step 6: Final answer
    x = 296,985.48

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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.