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Finding the Fourth Proportional to 394,842.15, 592,201.26 and 128,600.43

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Solution

The fourth proportional to 394,842.15, 592,201.26 and 128,600.43 is: 192,880.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,842.15 : 592,201.26 = 128,600.43 : x
  2. Step 2: Convert to fraction form
    394,842.15/592,201.26 = 128,600.43/x
  3. Step 3: Cross multiply
    394,842.15x = 592,201.26 × 128,600.43
  4. Step 4: Simplify right side
    394,842.15x = 76,157,336,682.54
  5. Step 5: Solve for x
    x = 76,157,336,682.54/394,842.15
  6. Step 6: Final answer
    x = 192,880.46

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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.