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Finding the Fourth Proportional to 260,743.80, 391,115.70 and 201,694.80

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Solution

The fourth proportional to 260,743.80, 391,115.70 and 201,694.80 is: 302,542.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,743.80 : 391,115.70 = 201,694.80 : x
  2. Step 2: Convert to fraction form
    260,743.80/391,115.70 = 201,694.80/x
  3. Step 3: Cross multiply
    260,743.80x = 391,115.70 × 201,694.80
  4. Step 4: Simplify right side
    260,743.80x = 78,886,002,888.36
  5. Step 5: Solve for x
    x = 78,886,002,888.36/260,743.80
  6. Step 6: Final answer
    x = 302,542.20

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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.