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Finding the Fourth Proportional to 259,426.20, 389,212.20 and 126,310.80

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Solution

The fourth proportional to 259,426.20, 389,212.20 and 126,310.80 is: 189,501.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,426.20 : 389,212.20 = 126,310.80 : x
  2. Step 2: Convert to fraction form
    259,426.20/389,212.20 = 126,310.80/x
  3. Step 3: Cross multiply
    259,426.20x = 389,212.20 × 126,310.80
  4. Step 4: Simplify right side
    259,426.20x = 49,161,704,351.76
  5. Step 5: Solve for x
    x = 49,161,704,351.76/259,426.20
  6. Step 6: Final answer
    x = 189,501.69

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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.