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Finding the Fourth Proportional to 343,618.60, 515,816.70 and 203,456.20

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Solution

The fourth proportional to 343,618.60, 515,816.70 and 203,456.20 is: 305,414.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,618.60 : 515,816.70 = 203,456.20 : x
  2. Step 2: Convert to fraction form
    343,618.60/515,816.70 = 203,456.20/x
  3. Step 3: Cross multiply
    343,618.60x = 515,816.70 × 203,456.20
  4. Step 4: Simplify right side
    343,618.60x = 104,946,105,678.54
  5. Step 5: Solve for x
    x = 104,946,105,678.54/343,618.60
  6. Step 6: Final answer
    x = 305,414.51

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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.