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Finding the Fourth Proportional to 1,786.05, 2,679.50 and 745.48

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Solution

The fourth proportional to 1,786.05, 2,679.50 and 745.48 is: 1,118.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.05 : 2,679.50 = 745.48 : x
  2. Step 2: Convert to fraction form
    1,786.05/2,679.50 = 745.48/x
  3. Step 3: Cross multiply
    1,786.05x = 2,679.50 × 745.48
  4. Step 4: Simplify right side
    1,786.05x = 1,997,500.26
  5. Step 5: Solve for x
    x = 1,997,500.26/1,786.05
  6. Step 6: Final answer
    x = 1,118.39

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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.