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Finding the Fourth Proportional to 379,811.92, 523,793.64 and 326,079.76

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Solution

The fourth proportional to 379,811.92, 523,793.64 and 326,079.76 is: 449,692.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,811.92 : 523,793.64 = 326,079.76 : x
  2. Step 2: Convert to fraction form
    379,811.92/523,793.64 = 326,079.76/x
  3. Step 3: Cross multiply
    379,811.92x = 523,793.64 × 326,079.76
  4. Step 4: Simplify right side
    379,811.92x = 170,798,504,420.73
  5. Step 5: Solve for x
    x = 170,798,504,420.73/379,811.92
  6. Step 6: Final answer
    x = 449,692.32

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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.