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Finding the Fourth Proportional to 621,813.26, 858,025.14 and 392,283.56

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Solution

The fourth proportional to 621,813.26, 858,025.14 and 392,283.56 is: 541,302.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,813.26 : 858,025.14 = 392,283.56 : x
  2. Step 2: Convert to fraction form
    621,813.26/858,025.14 = 392,283.56/x
  3. Step 3: Cross multiply
    621,813.26x = 858,025.14 × 392,283.56
  4. Step 4: Simplify right side
    621,813.26x = 336,589,152,198.57
  5. Step 5: Solve for x
    x = 336,589,152,198.57/621,813.26
  6. Step 6: Final answer
    x = 541,302.63

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1.5x scale

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.