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Finding the Fourth Proportional to 259,479.20, 389,218.80 and 170,832.80

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Solution

The fourth proportional to 259,479.20, 389,218.80 and 170,832.80 is: 256,249.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,479.20 : 389,218.80 = 170,832.80 : x
  2. Step 2: Convert to fraction form
    259,479.20/389,218.80 = 170,832.80/x
  3. Step 3: Cross multiply
    259,479.20x = 389,218.80 × 170,832.80
  4. Step 4: Simplify right side
    259,479.20x = 66,491,337,416.64
  5. Step 5: Solve for x
    x = 66,491,337,416.64/259,479.20
  6. Step 6: Final answer
    x = 256,249.20

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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.