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Finding the Fourth Proportional to 3,927, 5,890.74 and 1,191

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Solution

The fourth proportional to 3,927, 5,890.74 and 1,191 is: 1,786.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927 : 5,890.74 = 1,191 : x
  2. Step 2: Convert to fraction form
    3,927/5,890.74 = 1,191/x
  3. Step 3: Cross multiply
    3,927x = 5,890.74 × 1,191
  4. Step 4: Simplify right side
    3,927x = 7,015,871.34
  5. Step 5: Solve for x
    x = 7,015,871.34/3,927
  6. Step 6: Final answer
    x = 1,786.57

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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.