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Finding the Fourth Proportional to 412,690.75, 618,957.41 and 128,384.82

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Solution

The fourth proportional to 412,690.75, 618,957.41 and 128,384.82 is: 192,552.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,690.75 : 618,957.41 = 128,384.82 : x
  2. Step 2: Convert to fraction form
    412,690.75/618,957.41 = 128,384.82/x
  3. Step 3: Cross multiply
    412,690.75x = 618,957.41 × 128,384.82
  4. Step 4: Simplify right side
    412,690.75x = 79,464,735,028.59
  5. Step 5: Solve for x
    x = 79,464,735,028.59/412,690.75
  6. Step 6: Final answer
    x = 192,552.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.