Home / 394,427.70-591,641.55-128,196.90

Finding the Fourth Proportional to 394,427.70, 591,641.55 and 128,196.90

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Solution

The fourth proportional to 394,427.70, 591,641.55 and 128,196.90 is: 192,295.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,427.70 : 591,641.55 = 128,196.90 : x
  2. Step 2: Convert to fraction form
    394,427.70/591,641.55 = 128,196.90/x
  3. Step 3: Cross multiply
    394,427.70x = 591,641.55 × 128,196.90
  4. Step 4: Simplify right side
    394,427.70x = 75,846,612,621.20
  5. Step 5: Solve for x
    x = 75,846,612,621.20/394,427.70
  6. Step 6: Final answer
    x = 192,295.35

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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.