Home / 643,755.20-965,632.80-394,577.60

Finding the Fourth Proportional to 643,755.20, 965,632.80 and 394,577.60

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Solution

The fourth proportional to 643,755.20, 965,632.80 and 394,577.60 is: 591,866.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,755.20 : 965,632.80 = 394,577.60 : x
  2. Step 2: Convert to fraction form
    643,755.20/965,632.80 = 394,577.60/x
  3. Step 3: Cross multiply
    643,755.20x = 965,632.80 × 394,577.60
  4. Step 4: Simplify right side
    643,755.20x = 381,017,072,705.28
  5. Step 5: Solve for x
    x = 381,017,072,705.28/643,755.20
  6. Step 6: Final answer
    x = 591,866.40

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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.