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Finding the Fourth Proportional to 619,856.61, 855,343.05 and 347,862.15

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Solution

The fourth proportional to 619,856.61, 855,343.05 and 347,862.15 is: 480,016.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,856.61 : 855,343.05 = 347,862.15 : x
  2. Step 2: Convert to fraction form
    619,856.61/855,343.05 = 347,862.15/x
  3. Step 3: Cross multiply
    619,856.61x = 855,343.05 × 347,862.15
  4. Step 4: Simplify right side
    619,856.61x = 297,541,475,568.09
  5. Step 5: Solve for x
    x = 297,541,475,568.09/619,856.61
  6. Step 6: Final answer
    x = 480,016.62

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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.