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Finding the Fourth Proportional to 343,961.90, 515,770.05 and 156,761.90

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Solution

The fourth proportional to 343,961.90, 515,770.05 and 156,761.90 is: 235,064.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,961.90 : 515,770.05 = 156,761.90 : x
  2. Step 2: Convert to fraction form
    343,961.90/515,770.05 = 156,761.90/x
  3. Step 3: Cross multiply
    343,961.90x = 515,770.05 × 156,761.90
  4. Step 4: Simplify right side
    343,961.90x = 80,853,093,001.10
  5. Step 5: Solve for x
    x = 80,853,093,001.10/343,961.90
  6. Step 6: Final answer
    x = 235,064.10

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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.