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Finding the Fourth Proportional to 505,877.22, 698,105.61 and 279,517.86

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Solution

The fourth proportional to 505,877.22, 698,105.61 and 279,517.86 is: 385,731.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,877.22 : 698,105.61 = 279,517.86 : x
  2. Step 2: Convert to fraction form
    505,877.22/698,105.61 = 279,517.86/x
  3. Step 3: Cross multiply
    505,877.22x = 698,105.61 × 279,517.86
  4. Step 4: Simplify right side
    505,877.22x = 195,132,986,161.20
  5. Step 5: Solve for x
    x = 195,132,986,161.20/505,877.22
  6. Step 6: Final answer
    x = 385,731.91

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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.