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Finding the Fourth Proportional to 579,847.31, 800,195.78 and 321,728.93

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Solution

The fourth proportional to 579,847.31, 800,195.78 and 321,728.93 is: 443,989.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,847.31 : 800,195.78 = 321,728.93 : x
  2. Step 2: Convert to fraction form
    579,847.31/800,195.78 = 321,728.93/x
  3. Step 3: Cross multiply
    579,847.31x = 800,195.78 × 321,728.93
  4. Step 4: Simplify right side
    579,847.31x = 257,446,132,089.92
  5. Step 5: Solve for x
    x = 257,446,132,089.92/579,847.31
  6. Step 6: Final answer
    x = 443,989.53

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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.