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Finding the Fourth Proportional to 3,271.22, 4,906.70 and 805.92

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Solution

The fourth proportional to 3,271.22, 4,906.70 and 805.92 is: 1,208.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,271.22 : 4,906.70 = 805.92 : x
  2. Step 2: Convert to fraction form
    3,271.22/4,906.70 = 805.92/x
  3. Step 3: Cross multiply
    3,271.22x = 4,906.70 × 805.92
  4. Step 4: Simplify right side
    3,271.22x = 3,954,407.66
  5. Step 5: Solve for x
    x = 3,954,407.66/3,271.22
  6. Step 6: Final answer
    x = 1,208.85

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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.