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Finding the Fourth Proportional to 641,846.12, 885,761.16 and 351,469.88

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Solution

The fourth proportional to 641,846.12, 885,761.16 and 351,469.88 is: 485,035.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,846.12 : 885,761.16 = 351,469.88 : x
  2. Step 2: Convert to fraction form
    641,846.12/885,761.16 = 351,469.88/x
  3. Step 3: Cross multiply
    641,846.12x = 885,761.16 × 351,469.88
  4. Step 4: Simplify right side
    641,846.12x = 311,318,368,613.86
  5. Step 5: Solve for x
    x = 311,318,368,613.86/641,846.12
  6. Step 6: Final answer
    x = 485,035.83

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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.