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Finding the Fourth Proportional to 641,770.56, 958,755.48 and 415,285.92

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Solution

The fourth proportional to 641,770.56, 958,755.48 and 415,285.92 is: 620,404.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,770.56 : 958,755.48 = 415,285.92 : x
  2. Step 2: Convert to fraction form
    641,770.56/958,755.48 = 415,285.92/x
  3. Step 3: Cross multiply
    641,770.56x = 958,755.48 × 415,285.92
  4. Step 4: Simplify right side
    641,770.56x = 398,157,651,566.84
  5. Step 5: Solve for x
    x = 398,157,651,566.84/641,770.56
  6. Step 6: Final answer
    x = 620,404.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.