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Finding the Fourth Proportional to 612,653.12, 844,874.55 and 405,593.73

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Solution

The fourth proportional to 612,653.12, 844,874.55 and 405,593.73 is: 559,330.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,653.12 : 844,874.55 = 405,593.73 : x
  2. Step 2: Convert to fraction form
    612,653.12/844,874.55 = 405,593.73/x
  3. Step 3: Cross multiply
    612,653.12x = 844,874.55 × 405,593.73
  4. Step 4: Simplify right side
    612,653.12x = 342,675,820,116.57
  5. Step 5: Solve for x
    x = 342,675,820,116.57/612,653.12
  6. Step 6: Final answer
    x = 559,330.90

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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.