Home / 643,734.20-965,601.30-394,556.60

Finding the Fourth Proportional to 643,734.20, 965,601.30 and 394,556.60

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Solution

The fourth proportional to 643,734.20, 965,601.30 and 394,556.60 is: 591,834.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,734.20 : 965,601.30 = 394,556.60 : x
  2. Step 2: Convert to fraction form
    643,734.20/965,601.30 = 394,556.60/x
  3. Step 3: Cross multiply
    643,734.20x = 965,601.30 × 394,556.60
  4. Step 4: Simplify right side
    643,734.20x = 380,984,365,883.58
  5. Step 5: Solve for x
    x = 380,984,365,883.58/643,734.20
  6. Step 6: Final answer
    x = 591,834.90

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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.