Home / 396,639.20-547,358.90-215,347.54

Finding the Fourth Proportional to 396,639.20, 547,358.90 and 215,347.54

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Solution

The fourth proportional to 396,639.20, 547,358.90 and 215,347.54 is: 297,177.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,639.20 : 547,358.90 = 215,347.54 : x
  2. Step 2: Convert to fraction form
    396,639.20/547,358.90 = 215,347.54/x
  3. Step 3: Cross multiply
    396,639.20x = 547,358.90 × 215,347.54
  4. Step 4: Simplify right side
    396,639.20x = 117,872,392,612.11
  5. Step 5: Solve for x
    x = 117,872,392,612.11/396,639.20
  6. Step 6: Final answer
    x = 297,177.87

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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.