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Finding the Fourth Proportional to 3,771.67, 5,658.31 and 1,139.37

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Solution

The fourth proportional to 3,771.67, 5,658.31 and 1,139.37 is: 1,709.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,771.67 : 5,658.31 = 1,139.37 : x
  2. Step 2: Convert to fraction form
    3,771.67/5,658.31 = 1,139.37/x
  3. Step 3: Cross multiply
    3,771.67x = 5,658.31 × 1,139.37
  4. Step 4: Simplify right side
    3,771.67x = 6,446,914.29
  5. Step 5: Solve for x
    x = 6,446,914.29/3,771.67
  6. Step 6: Final answer
    x = 1,709.30

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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.