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Finding the Fourth Proportional to 260,793.88, 391,190.82 and 142,400.63

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Solution

The fourth proportional to 260,793.88, 391,190.82 and 142,400.63 is: 213,600.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,793.88 : 391,190.82 = 142,400.63 : x
  2. Step 2: Convert to fraction form
    260,793.88/391,190.82 = 142,400.63/x
  3. Step 3: Cross multiply
    260,793.88x = 391,190.82 × 142,400.63
  4. Step 4: Simplify right side
    260,793.88x = 55,705,819,662.19
  5. Step 5: Solve for x
    x = 55,705,819,662.19/260,793.88
  6. Step 6: Final answer
    x = 213,600.95

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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.