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Finding the Fourth Proportional to 376,923, 520,121.34 and 221,857.86

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Solution

The fourth proportional to 376,923, 520,121.34 and 221,857.86 is: 306,144.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,923 : 520,121.34 = 221,857.86 : x
  2. Step 2: Convert to fraction form
    376,923/520,121.34 = 221,857.86/x
  3. Step 3: Cross multiply
    376,923x = 520,121.34 × 221,857.86
  4. Step 4: Simplify right side
    376,923x = 115,393,007,432.73
  5. Step 5: Solve for x
    x = 115,393,007,432.73/376,923
  6. Step 6: Final answer
    x = 306,144.78

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1.5x scale

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.