Home / 643,945.60-965,534.40-394,806.40

Finding the Fourth Proportional to 643,945.60, 965,534.40 and 394,806.40

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Solution

The fourth proportional to 643,945.60, 965,534.40 and 394,806.40 is: 591,974.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,945.60 : 965,534.40 = 394,806.40 : x
  2. Step 2: Convert to fraction form
    643,945.60/965,534.40 = 394,806.40/x
  3. Step 3: Cross multiply
    643,945.60x = 965,534.40 × 394,806.40
  4. Step 4: Simplify right side
    643,945.60x = 381,199,160,540.16
  5. Step 5: Solve for x
    x = 381,199,160,540.16/643,945.60
  6. Step 6: Final answer
    x = 591,974.17

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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.