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Finding the Fourth Proportional to 323,780.44, 486,093.02 and 217,639.86

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Solution

The fourth proportional to 323,780.44, 486,093.02 and 217,639.86 is: 326,743.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,780.44 : 486,093.02 = 217,639.86 : x
  2. Step 2: Convert to fraction form
    323,780.44/486,093.02 = 217,639.86/x
  3. Step 3: Cross multiply
    323,780.44x = 486,093.02 × 217,639.86
  4. Step 4: Simplify right side
    323,780.44x = 105,793,216,819.78
  5. Step 5: Solve for x
    x = 105,793,216,819.78/323,780.44
  6. Step 6: Final answer
    x = 326,743.69

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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.