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Finding the Fourth Proportional to 396,595.70, 547,311.59 and 215,315.27

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Solution

The fourth proportional to 396,595.70, 547,311.59 and 215,315.27 is: 297,140.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,595.70 : 547,311.59 = 215,315.27 : x
  2. Step 2: Convert to fraction form
    396,595.70/547,311.59 = 215,315.27/x
  3. Step 3: Cross multiply
    396,595.70x = 547,311.59 × 215,315.27
  4. Step 4: Simplify right side
    396,595.70x = 117,844,541,698.40
  5. Step 5: Solve for x
    x = 117,844,541,698.40/396,595.70
  6. Step 6: Final answer
    x = 297,140.24

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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.