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Finding the Fourth Proportional to 619,636.41, 855,028.80 and 347,647.77

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Solution

The fourth proportional to 619,636.41, 855,028.80 and 347,647.77 is: 479,714.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,636.41 : 855,028.80 = 347,647.77 : x
  2. Step 2: Convert to fraction form
    619,636.41/855,028.80 = 347,647.77/x
  3. Step 3: Cross multiply
    619,636.41x = 855,028.80 × 347,647.77
  4. Step 4: Simplify right side
    619,636.41x = 297,248,855,605.78
  5. Step 5: Solve for x
    x = 297,248,855,605.78/619,636.41
  6. Step 6: Final answer
    x = 479,714.96

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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.