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Finding the Fourth Proportional to 3,271.40, 4,907.11 and 806.28

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Solution

The fourth proportional to 3,271.40, 4,907.11 and 806.28 is: 1,209.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,271.40 : 4,907.11 = 806.28 : x
  2. Step 2: Convert to fraction form
    3,271.40/4,907.11 = 806.28/x
  3. Step 3: Cross multiply
    3,271.40x = 4,907.11 × 806.28
  4. Step 4: Simplify right side
    3,271.40x = 3,956,504.65
  5. Step 5: Solve for x
    x = 3,956,504.65/3,271.40
  6. Step 6: Final answer
    x = 1,209.42

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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.