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Finding the Fourth Proportional to 408,108.80, 612,163.20 and 329,376.80

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Solution

The fourth proportional to 408,108.80, 612,163.20 and 329,376.80 is: 494,065.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,108.80 : 612,163.20 = 329,376.80 : x
  2. Step 2: Convert to fraction form
    408,108.80/612,163.20 = 329,376.80/x
  3. Step 3: Cross multiply
    408,108.80x = 612,163.20 × 329,376.80
  4. Step 4: Simplify right side
    408,108.80x = 201,632,355,893.76
  5. Step 5: Solve for x
    x = 201,632,355,893.76/408,108.80
  6. Step 6: Final answer
    x = 494,065.20

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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.