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Finding the Fourth Proportional to 260,842.20, 391,336.20 and 127,726.80

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Solution

The fourth proportional to 260,842.20, 391,336.20 and 127,726.80 is: 191,625.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,842.20 : 391,336.20 = 127,726.80 : x
  2. Step 2: Convert to fraction form
    260,842.20/391,336.20 = 127,726.80/x
  3. Step 3: Cross multiply
    260,842.20x = 391,336.20 × 127,726.80
  4. Step 4: Simplify right side
    260,842.20x = 49,984,120,550.16
  5. Step 5: Solve for x
    x = 49,984,120,550.16/260,842.20
  6. Step 6: Final answer
    x = 191,625.90

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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.