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Finding the Fourth Proportional to 620,178.07, 928,910.80 and 439,716.48

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Solution

The fourth proportional to 620,178.07, 928,910.80 and 439,716.48 is: 658,613.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,178.07 : 928,910.80 = 439,716.48 : x
  2. Step 2: Convert to fraction form
    620,178.07/928,910.80 = 439,716.48/x
  3. Step 3: Cross multiply
    620,178.07x = 928,910.80 × 439,716.48
  4. Step 4: Simplify right side
    620,178.07x = 408,457,387,209.98
  5. Step 5: Solve for x
    x = 408,457,387,209.98/620,178.07
  6. Step 6: Final answer
    x = 658,613.08

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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.