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Finding the Fourth Proportional to 260,846.20, 391,342.20 and 127,730.80

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Solution

The fourth proportional to 260,846.20, 391,342.20 and 127,730.80 is: 191,631.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,846.20 : 391,342.20 = 127,730.80 : x
  2. Step 2: Convert to fraction form
    260,846.20/391,342.20 = 127,730.80/x
  3. Step 3: Cross multiply
    260,846.20x = 391,342.20 × 127,730.80
  4. Step 4: Simplify right side
    260,846.20x = 49,986,452,279.76
  5. Step 5: Solve for x
    x = 49,986,452,279.76/260,846.20
  6. Step 6: Final answer
    x = 191,631.90

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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.