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Finding the Fourth Proportional to 579,856.07, 800,245.21 and 321,781.88

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Solution

The fourth proportional to 579,856.07, 800,245.21 and 321,781.88 is: 444,083.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,856.07 : 800,245.21 = 321,781.88 : x
  2. Step 2: Convert to fraction form
    579,856.07/800,245.21 = 321,781.88/x
  3. Step 3: Cross multiply
    579,856.07x = 800,245.21 × 321,781.88
  4. Step 4: Simplify right side
    579,856.07x = 257,504,408,134.80
  5. Step 5: Solve for x
    x = 257,504,408,134.80/579,856.07
  6. Step 6: Final answer
    x = 444,083.32

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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.