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Finding the Fourth Proportional to 619,857.61, 855,344.43 and 347,863.15

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Solution

The fourth proportional to 619,857.61, 855,344.43 and 347,863.15 is: 480,018.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,857.61 : 855,344.43 = 347,863.15 : x
  2. Step 2: Convert to fraction form
    619,857.61/855,344.43 = 347,863.15/x
  3. Step 3: Cross multiply
    619,857.61x = 855,344.43 × 347,863.15
  4. Step 4: Simplify right side
    619,857.61x = 297,542,807,754.76
  5. Step 5: Solve for x
    x = 297,542,807,754.76/619,857.61
  6. Step 6: Final answer
    x = 480,018.00

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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.