Home / 428,414.10-641,945.24-158,170.62

Finding the Fourth Proportional to 428,414.10, 641,945.24 and 158,170.62

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Solution

The fourth proportional to 428,414.10, 641,945.24 and 158,170.62 is: 237,006.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,414.10 : 641,945.24 = 158,170.62 : x
  2. Step 2: Convert to fraction form
    428,414.10/641,945.24 = 158,170.62/x
  3. Step 3: Cross multiply
    428,414.10x = 641,945.24 × 158,170.62
  4. Step 4: Simplify right side
    428,414.10x = 101,536,876,616.85
  5. Step 5: Solve for x
    x = 101,536,876,616.85/428,414.10
  6. Step 6: Final answer
    x = 237,006.38

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1.5x scale

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.