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Finding the Fourth Proportional to 3,886.26, 5,827.41 and 1,420.44

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Solution

The fourth proportional to 3,886.26, 5,827.41 and 1,420.44 is: 2,129.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,886.26 : 5,827.41 = 1,420.44 : x
  2. Step 2: Convert to fraction form
    3,886.26/5,827.41 = 1,420.44/x
  3. Step 3: Cross multiply
    3,886.26x = 5,827.41 × 1,420.44
  4. Step 4: Simplify right side
    3,886.26x = 8,277,486.26
  5. Step 5: Solve for x
    x = 8,277,486.26/3,886.26
  6. Step 6: Final answer
    x = 2,129.94

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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.