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Finding the Fourth Proportional to 439,261, 606,245.22 and 278,131

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Solution

The fourth proportional to 439,261, 606,245.22 and 278,131 is: 383,861.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,261 : 606,245.22 = 278,131 : x
  2. Step 2: Convert to fraction form
    439,261/606,245.22 = 278,131/x
  3. Step 3: Cross multiply
    439,261x = 606,245.22 × 278,131
  4. Step 4: Simplify right side
    439,261x = 168,615,589,283.82
  5. Step 5: Solve for x
    x = 168,615,589,283.82/439,261
  6. Step 6: Final answer
    x = 383,861.96

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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.