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Finding the Fourth Proportional to 1,853.14, 2,778.10 and 756.81

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Solution

The fourth proportional to 1,853.14, 2,778.10 and 756.81 is: 1,134.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,853.14 : 2,778.10 = 756.81 : x
  2. Step 2: Convert to fraction form
    1,853.14/2,778.10 = 756.81/x
  3. Step 3: Cross multiply
    1,853.14x = 2,778.10 × 756.81
  4. Step 4: Simplify right side
    1,853.14x = 2,102,493.86
  5. Step 5: Solve for x
    x = 2,102,493.86/1,853.14
  6. Step 6: Final answer
    x = 1,134.56

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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.