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Finding the Fourth Proportional to 3,291.26, 4,936.82 and 826.08

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Solution

The fourth proportional to 3,291.26, 4,936.82 and 826.08 is: 1,239.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,291.26 : 4,936.82 = 826.08 : x
  2. Step 2: Convert to fraction form
    3,291.26/4,936.82 = 826.08/x
  3. Step 3: Cross multiply
    3,291.26x = 4,936.82 × 826.08
  4. Step 4: Simplify right side
    3,291.26x = 4,078,208.27
  5. Step 5: Solve for x
    x = 4,078,208.27/3,291.26
  6. Step 6: Final answer
    x = 1,239.10

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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.