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Finding the Fourth Proportional to 505,806.56, 698,004.78 and 276,358.81

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Solution

The fourth proportional to 505,806.56, 698,004.78 and 276,358.81 is: 381,370.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,806.56 : 698,004.78 = 276,358.81 : x
  2. Step 2: Convert to fraction form
    505,806.56/698,004.78 = 276,358.81/x
  3. Step 3: Cross multiply
    505,806.56x = 698,004.78 × 276,358.81
  4. Step 4: Simplify right side
    505,806.56x = 192,899,766,885.09
  5. Step 5: Solve for x
    x = 192,899,766,885.09/505,806.56
  6. Step 6: Final answer
    x = 381,370.63

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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.