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Finding the Fourth Proportional to 384,092.20, 576,138.30 and 321,106.60

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Solution

The fourth proportional to 384,092.20, 576,138.30 and 321,106.60 is: 481,659.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,092.20 : 576,138.30 = 321,106.60 : x
  2. Step 2: Convert to fraction form
    384,092.20/576,138.30 = 321,106.60/x
  3. Step 3: Cross multiply
    384,092.20x = 576,138.30 × 321,106.60
  4. Step 4: Simplify right side
    384,092.20x = 185,001,810,642.78
  5. Step 5: Solve for x
    x = 185,001,810,642.78/384,092.20
  6. Step 6: Final answer
    x = 481,659.90

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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.