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Finding the Fourth Proportional to 396,863.42, 595,377.14 and 130,639.91

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Solution

The fourth proportional to 396,863.42, 595,377.14 and 130,639.91 is: 195,986.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,863.42 : 595,377.14 = 130,639.91 : x
  2. Step 2: Convert to fraction form
    396,863.42/595,377.14 = 130,639.91/x
  3. Step 3: Cross multiply
    396,863.42x = 595,377.14 × 130,639.91
  4. Step 4: Simplify right side
    396,863.42x = 77,780,012,355.57
  5. Step 5: Solve for x
    x = 77,780,012,355.57/396,863.42
  6. Step 6: Final answer
    x = 195,986.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.