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Finding the Fourth Proportional to 449,380.31, 620,149.07 and 255,778.57

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Solution

The fourth proportional to 449,380.31, 620,149.07 and 255,778.57 is: 352,976.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,380.31 : 620,149.07 = 255,778.57 : x
  2. Step 2: Convert to fraction form
    449,380.31/620,149.07 = 255,778.57/x
  3. Step 3: Cross multiply
    449,380.31x = 620,149.07 × 255,778.57
  4. Step 4: Simplify right side
    449,380.31x = 158,620,841,032.54
  5. Step 5: Solve for x
    x = 158,620,841,032.54/449,380.31
  6. Step 6: Final answer
    x = 352,976.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.