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Finding the Fourth Proportional to 1,859.03, 2,786.11 and 1,393.15

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Solution

The fourth proportional to 1,859.03, 2,786.11 and 1,393.15 is: 2,087.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,859.03 : 2,786.11 = 1,393.15 : x
  2. Step 2: Convert to fraction form
    1,859.03/2,786.11 = 1,393.15/x
  3. Step 3: Cross multiply
    1,859.03x = 2,786.11 × 1,393.15
  4. Step 4: Simplify right side
    1,859.03x = 3,881,469.15
  5. Step 5: Solve for x
    x = 3,881,469.15/1,859.03
  6. Step 6: Final answer
    x = 2,087.90

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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.