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Finding the Fourth Proportional to 260,843.20, 391,337.70 and 127,727.80

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Solution

The fourth proportional to 260,843.20, 391,337.70 and 127,727.80 is: 191,627.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,843.20 : 391,337.70 = 127,727.80 : x
  2. Step 2: Convert to fraction form
    260,843.20/391,337.70 = 127,727.80/x
  3. Step 3: Cross multiply
    260,843.20x = 391,337.70 × 127,727.80
  4. Step 4: Simplify right side
    260,843.20x = 49,984,703,478.06
  5. Step 5: Solve for x
    x = 49,984,703,478.06/260,843.20
  6. Step 6: Final answer
    x = 191,627.40

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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.