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Finding the Fourth Proportional to 621,391.14, 857,550.78 and 349,544.61

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Solution

The fourth proportional to 621,391.14, 857,550.78 and 349,544.61 is: 482,389.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,391.14 : 857,550.78 = 349,544.61 : x
  2. Step 2: Convert to fraction form
    621,391.14/857,550.78 = 349,544.61/x
  3. Step 3: Cross multiply
    621,391.14x = 857,550.78 × 349,544.61
  4. Step 4: Simplify right side
    621,391.14x = 299,752,252,950.30
  5. Step 5: Solve for x
    x = 299,752,252,950.30/621,391.14
  6. Step 6: Final answer
    x = 482,389.00

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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.