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Finding the Fourth Proportional to 396,639.61, 595,195.80 and 143,939.83

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Solution

The fourth proportional to 396,639.61, 595,195.80 and 143,939.83 is: 215,995.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,639.61 : 595,195.80 = 143,939.83 : x
  2. Step 2: Convert to fraction form
    396,639.61/595,195.80 = 143,939.83/x
  3. Step 3: Cross multiply
    396,639.61x = 595,195.80 × 143,939.83
  4. Step 4: Simplify right side
    396,639.61x = 85,672,382,268.71
  5. Step 5: Solve for x
    x = 85,672,382,268.71/396,639.61
  6. Step 6: Final answer
    x = 215,995.53

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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.