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Finding the Fourth Proportional to 391,933.86, 540,874.49 and 219,889.86

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Solution

The fourth proportional to 391,933.86, 540,874.49 and 219,889.86 is: 303,451.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,933.86 : 540,874.49 = 219,889.86 : x
  2. Step 2: Convert to fraction form
    391,933.86/540,874.49 = 219,889.86/x
  3. Step 3: Cross multiply
    391,933.86x = 540,874.49 × 219,889.86
  4. Step 4: Simplify right side
    391,933.86x = 118,932,815,883.67
  5. Step 5: Solve for x
    x = 118,932,815,883.67/391,933.86
  6. Step 6: Final answer
    x = 303,451.24

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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.