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Finding the Fourth Proportional to 620,178.57, 928,911.55 and 439,716.98

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Solution

The fourth proportional to 620,178.57, 928,911.55 and 439,716.98 is: 658,613.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,178.57 : 928,911.55 = 439,716.98 : x
  2. Step 2: Convert to fraction form
    620,178.57/928,911.55 = 439,716.98/x
  3. Step 3: Cross multiply
    620,178.57x = 928,911.55 × 439,716.98
  4. Step 4: Simplify right side
    620,178.57x = 408,458,181,453.12
  5. Step 5: Solve for x
    x = 408,458,181,453.12/620,178.57
  6. Step 6: Final answer
    x = 658,613.83

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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.