Home / 396,815.31-547,609.11-215,530.79

Finding the Fourth Proportional to 396,815.31, 547,609.11 and 215,530.79

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Solution

The fourth proportional to 396,815.31, 547,609.11 and 215,530.79 is: 297,434.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,815.31 : 547,609.11 = 215,530.79 : x
  2. Step 2: Convert to fraction form
    396,815.31/547,609.11 = 215,530.79/x
  3. Step 3: Cross multiply
    396,815.31x = 547,609.11 × 215,530.79
  4. Step 4: Simplify right side
    396,815.31x = 118,026,620,543.21
  5. Step 5: Solve for x
    x = 118,026,620,543.21/396,815.31
  6. Step 6: Final answer
    x = 297,434.64

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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.