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Finding the Fourth Proportional to 619,776.70, 855,255.91 and 347,819.20

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Solution

The fourth proportional to 619,776.70, 855,255.91 and 347,819.20 is: 479,970.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,776.70 : 855,255.91 = 347,819.20 : x
  2. Step 2: Convert to fraction form
    619,776.70/855,255.91 = 347,819.20/x
  3. Step 3: Cross multiply
    619,776.70x = 855,255.91 × 347,819.20
  4. Step 4: Simplify right side
    619,776.70x = 297,474,421,265.65
  5. Step 5: Solve for x
    x = 297,474,421,265.65/619,776.70
  6. Step 6: Final answer
    x = 479,970.32

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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.