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Finding the Fourth Proportional to 394,429.60, 591,644.40 and 328,819.60

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Solution

The fourth proportional to 394,429.60, 591,644.40 and 328,819.60 is: 493,229.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,429.60 : 591,644.40 = 328,819.60 : x
  2. Step 2: Convert to fraction form
    394,429.60/591,644.40 = 328,819.60/x
  3. Step 3: Cross multiply
    394,429.60x = 591,644.40 × 328,819.60
  4. Step 4: Simplify right side
    394,429.60x = 194,544,274,950.24
  5. Step 5: Solve for x
    x = 194,544,274,950.24/394,429.60
  6. Step 6: Final answer
    x = 493,229.40

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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.