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Finding the Fourth Proportional to 5,294.56, 7,942.74 and 1,831

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Solution

The fourth proportional to 5,294.56, 7,942.74 and 1,831 is: 2,746.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,294.56 : 7,942.74 = 1,831 : x
  2. Step 2: Convert to fraction form
    5,294.56/7,942.74 = 1,831/x
  3. Step 3: Cross multiply
    5,294.56x = 7,942.74 × 1,831
  4. Step 4: Simplify right side
    5,294.56x = 14,543,156.94
  5. Step 5: Solve for x
    x = 14,543,156.94/5,294.56
  6. Step 6: Final answer
    x = 2,746.81

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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.