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Finding the Fourth Proportional to 275,708.40, 413,562.60 and 205,724.40

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Solution

The fourth proportional to 275,708.40, 413,562.60 and 205,724.40 is: 308,586.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,708.40 : 413,562.60 = 205,724.40 : x
  2. Step 2: Convert to fraction form
    275,708.40/413,562.60 = 205,724.40/x
  3. Step 3: Cross multiply
    275,708.40x = 413,562.60 × 205,724.40
  4. Step 4: Simplify right side
    275,708.40x = 85,079,917,747.44
  5. Step 5: Solve for x
    x = 85,079,917,747.44/275,708.40
  6. Step 6: Final answer
    x = 308,586.60

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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.