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Finding the Fourth Proportional to 612,656.49, 844,879.21 and 405,597.11

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Solution

The fourth proportional to 612,656.49, 844,879.21 and 405,597.11 is: 559,335.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,656.49 : 844,879.21 = 405,597.11 : x
  2. Step 2: Convert to fraction form
    612,656.49/844,879.21 = 405,597.11/x
  3. Step 3: Cross multiply
    612,656.49x = 844,879.21 × 405,597.11
  4. Step 4: Simplify right side
    612,656.49x = 342,680,560,636.69
  5. Step 5: Solve for x
    x = 342,680,560,636.69/612,656.49
  6. Step 6: Final answer
    x = 559,335.56

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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.