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Finding the Fourth Proportional to 260,690.55, 391,183.62 and 140,745.88

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Solution

The fourth proportional to 260,690.55, 391,183.62 and 140,745.88 is: 211,198.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,690.55 : 391,183.62 = 140,745.88 : x
  2. Step 2: Convert to fraction form
    260,690.55/391,183.62 = 140,745.88/x
  3. Step 3: Cross multiply
    260,690.55x = 391,183.62 × 140,745.88
  4. Step 4: Simplify right side
    260,690.55x = 55,057,482,838.49
  5. Step 5: Solve for x
    x = 55,057,482,838.49/260,690.55
  6. Step 6: Final answer
    x = 211,198.61

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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.