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Finding the Fourth Proportional to 579,817.60, 800,121.17 and 321,691.80

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Solution

The fourth proportional to 579,817.60, 800,121.17 and 321,691.80 is: 443,919.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,817.60 : 800,121.17 = 321,691.80 : x
  2. Step 2: Convert to fraction form
    579,817.60/800,121.17 = 321,691.80/x
  3. Step 3: Cross multiply
    579,817.60x = 800,121.17 × 321,691.80
  4. Step 4: Simplify right side
    579,817.60x = 257,392,419,395.41
  5. Step 5: Solve for x
    x = 257,392,419,395.41/579,817.60
  6. Step 6: Final answer
    x = 443,919.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.