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Finding the Fourth Proportional to 643,732.20, 965,598.30 and 394,554.60

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Solution

The fourth proportional to 643,732.20, 965,598.30 and 394,554.60 is: 591,831.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,732.20 : 965,598.30 = 394,554.60 : x
  2. Step 2: Convert to fraction form
    643,732.20/965,598.30 = 394,554.60/x
  3. Step 3: Cross multiply
    643,732.20x = 965,598.30 × 394,554.60
  4. Step 4: Simplify right side
    643,732.20x = 380,981,251,017.18
  5. Step 5: Solve for x
    x = 380,981,251,017.18/643,732.20
  6. Step 6: Final answer
    x = 591,831.90

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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.