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Finding the Fourth Proportional to 373,981.78, 561,176.79 and 216,517.78

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Solution

The fourth proportional to 373,981.78, 561,176.79 and 216,517.78 is: 324,894.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,981.78 : 561,176.79 = 216,517.78 : x
  2. Step 2: Convert to fraction form
    373,981.78/561,176.79 = 216,517.78/x
  3. Step 3: Cross multiply
    373,981.78x = 561,176.79 × 216,517.78
  4. Step 4: Simplify right side
    373,981.78x = 121,504,752,758.33
  5. Step 5: Solve for x
    x = 121,504,752,758.33/373,981.78
  6. Step 6: Final answer
    x = 324,894.85

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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.