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Finding the Fourth Proportional to 343,678.60, 515,906.70 and 203,516.20

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Solution

The fourth proportional to 343,678.60, 515,906.70 and 203,516.20 is: 305,504.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,678.60 : 515,906.70 = 203,516.20 : x
  2. Step 2: Convert to fraction form
    343,678.60/515,906.70 = 203,516.20/x
  3. Step 3: Cross multiply
    343,678.60x = 515,906.70 × 203,516.20
  4. Step 4: Simplify right side
    343,678.60x = 104,995,371,138.54
  5. Step 5: Solve for x
    x = 104,995,371,138.54/343,678.60
  6. Step 6: Final answer
    x = 305,504.54

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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.