Home / 394,421.40-591,486.30-128,190.60

Finding the Fourth Proportional to 394,421.40, 591,486.30 and 128,190.60

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Solution

The fourth proportional to 394,421.40, 591,486.30 and 128,190.60 is: 192,238.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,421.40 : 591,486.30 = 128,190.60 : x
  2. Step 2: Convert to fraction form
    394,421.40/591,486.30 = 128,190.60/x
  3. Step 3: Cross multiply
    394,421.40x = 591,486.30 × 128,190.60
  4. Step 4: Simplify right side
    394,421.40x = 75,822,983,688.78
  5. Step 5: Solve for x
    x = 75,822,983,688.78/394,421.40
  6. Step 6: Final answer
    x = 192,238.51

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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.