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Finding the Fourth Proportional to 619,554.63, 855,000.12 and 347,642.64

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Solution

The fourth proportional to 619,554.63, 855,000.12 and 347,642.64 is: 479,755.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,554.63 : 855,000.12 = 347,642.64 : x
  2. Step 2: Convert to fraction form
    619,554.63/855,000.12 = 347,642.64/x
  3. Step 3: Cross multiply
    619,554.63x = 855,000.12 × 347,642.64
  4. Step 4: Simplify right side
    619,554.63x = 297,234,498,917.12
  5. Step 5: Solve for x
    x = 297,234,498,917.12/619,554.63
  6. Step 6: Final answer
    x = 479,755.11

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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.