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Finding the Fourth Proportional to 343,922.20, 515,105.70 and 203,954.20

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Solution

The fourth proportional to 343,922.20, 515,105.70 and 203,954.20 is: 305,470.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,922.20 : 515,105.70 = 203,954.20 : x
  2. Step 2: Convert to fraction form
    343,922.20/515,105.70 = 203,954.20/x
  3. Step 3: Cross multiply
    343,922.20x = 515,105.70 × 203,954.20
  4. Step 4: Simplify right side
    343,922.20x = 105,057,970,958.94
  5. Step 5: Solve for x
    x = 105,057,970,958.94/343,922.20
  6. Step 6: Final answer
    x = 305,470.16

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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.