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Finding the Fourth Proportional to 279,906.63, 386,409.05 and 193,930.80

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Solution

The fourth proportional to 279,906.63, 386,409.05 and 193,930.80 is: 267,720.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,906.63 : 386,409.05 = 193,930.80 : x
  2. Step 2: Convert to fraction form
    279,906.63/386,409.05 = 193,930.80/x
  3. Step 3: Cross multiply
    279,906.63x = 386,409.05 × 193,930.80
  4. Step 4: Simplify right side
    279,906.63x = 74,936,616,193.74
  5. Step 5: Solve for x
    x = 74,936,616,193.74/279,906.63
  6. Step 6: Final answer
    x = 267,720.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.