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Finding the Fourth Proportional to 253,388.80, 379,929.60 and 126,881.92

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Solution

The fourth proportional to 253,388.80, 379,929.60 and 126,881.92 is: 190,245.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,388.80 : 379,929.60 = 126,881.92 : x
  2. Step 2: Convert to fraction form
    253,388.80/379,929.60 = 126,881.92/x
  3. Step 3: Cross multiply
    253,388.80x = 379,929.60 × 126,881.92
  4. Step 4: Simplify right side
    253,388.80x = 48,206,197,112.83
  5. Step 5: Solve for x
    x = 48,206,197,112.83/253,388.80
  6. Step 6: Final answer
    x = 190,245.97

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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.