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Finding the Fourth Proportional to 361,872.20, 542,808.30 and 328,629.80

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Solution

The fourth proportional to 361,872.20, 542,808.30 and 328,629.80 is: 492,944.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,872.20 : 542,808.30 = 328,629.80 : x
  2. Step 2: Convert to fraction form
    361,872.20/542,808.30 = 328,629.80/x
  3. Step 3: Cross multiply
    361,872.20x = 542,808.30 × 328,629.80
  4. Step 4: Simplify right side
    361,872.20x = 178,382,983,067.34
  5. Step 5: Solve for x
    x = 178,382,983,067.34/361,872.20
  6. Step 6: Final answer
    x = 492,944.70

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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.