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Finding the Fourth Proportional to 260,699.76, 391,197.56 and 140,755.11

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Solution

The fourth proportional to 260,699.76, 391,197.56 and 140,755.11 is: 211,212.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,699.76 : 391,197.56 = 140,755.11 : x
  2. Step 2: Convert to fraction form
    260,699.76/391,197.56 = 140,755.11/x
  3. Step 3: Cross multiply
    260,699.76x = 391,197.56 × 140,755.11
  4. Step 4: Simplify right side
    260,699.76x = 55,063,055,589.53
  5. Step 5: Solve for x
    x = 55,063,055,589.53/260,699.76
  6. Step 6: Final answer
    x = 211,212.53

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1.5x scale

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.