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Finding the Fourth Proportional to 619,873.25, 855,356.64 and 347,878.76

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Solution

The fourth proportional to 619,873.25, 855,356.64 and 347,878.76 is: 480,034.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,873.25 : 855,356.64 = 347,878.76 : x
  2. Step 2: Convert to fraction form
    619,873.25/855,356.64 = 347,878.76/x
  3. Step 3: Cross multiply
    619,873.25x = 855,356.64 × 347,878.76
  4. Step 4: Simplify right side
    619,873.25x = 297,560,407,280.97
  5. Step 5: Solve for x
    x = 297,560,407,280.97/619,873.25
  6. Step 6: Final answer
    x = 480,034.28

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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.