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Finding the Fourth Proportional to 481,231.20, 721,846.80 and 439,240.80

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Solution

The fourth proportional to 481,231.20, 721,846.80 and 439,240.80 is: 658,861.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,231.20 : 721,846.80 = 439,240.80 : x
  2. Step 2: Convert to fraction form
    481,231.20/721,846.80 = 439,240.80/x
  3. Step 3: Cross multiply
    481,231.20x = 721,846.80 × 439,240.80
  4. Step 4: Simplify right side
    481,231.20x = 317,064,565,909.44
  5. Step 5: Solve for x
    x = 317,064,565,909.44/481,231.20
  6. Step 6: Final answer
    x = 658,861.20

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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.