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Finding the Fourth Proportional to 396,640.08, 595,196.56 and 143,940.32

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Solution

The fourth proportional to 396,640.08, 595,196.56 and 143,940.32 is: 215,996.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,640.08 : 595,196.56 = 143,940.32 : x
  2. Step 2: Convert to fraction form
    396,640.08/595,196.56 = 143,940.32/x
  3. Step 3: Cross multiply
    396,640.08x = 595,196.56 × 143,940.32
  4. Step 4: Simplify right side
    396,640.08x = 85,672,783,309.30
  5. Step 5: Solve for x
    x = 85,672,783,309.30/396,640.08
  6. Step 6: Final answer
    x = 215,996.28

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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.