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Finding the Fourth Proportional to 505,786.20, 758,679.30 and 131,809.20

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Solution

The fourth proportional to 505,786.20, 758,679.30 and 131,809.20 is: 197,713.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,786.20 : 758,679.30 = 131,809.20 : x
  2. Step 2: Convert to fraction form
    505,786.20/758,679.30 = 131,809.20/x
  3. Step 3: Cross multiply
    505,786.20x = 758,679.30 × 131,809.20
  4. Step 4: Simplify right side
    505,786.20x = 100,000,911,589.56
  5. Step 5: Solve for x
    x = 100,000,911,589.56/505,786.20
  6. Step 6: Final answer
    x = 197,713.80

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Double scale
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Similar ratio
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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.