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Finding the Fourth Proportional to 3,480.82, 4,804.11 and 1,989.21

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Solution

The fourth proportional to 3,480.82, 4,804.11 and 1,989.21 is: 2,745.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.82 : 4,804.11 = 1,989.21 : x
  2. Step 2: Convert to fraction form
    3,480.82/4,804.11 = 1,989.21/x
  3. Step 3: Cross multiply
    3,480.82x = 4,804.11 × 1,989.21
  4. Step 4: Simplify right side
    3,480.82x = 9,556,374.65
  5. Step 5: Solve for x
    x = 9,556,374.65/3,480.82
  6. Step 6: Final answer
    x = 2,745.44

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.