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Finding the Fourth Proportional to 3,608.63, 4,979.93 and 2,211.38

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Solution

The fourth proportional to 3,608.63, 4,979.93 and 2,211.38 is: 3,051.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.63 : 4,979.93 = 2,211.38 : x
  2. Step 2: Convert to fraction form
    3,608.63/4,979.93 = 2,211.38/x
  3. Step 3: Cross multiply
    3,608.63x = 4,979.93 × 2,211.38
  4. Step 4: Simplify right side
    3,608.63x = 11,012,481.65
  5. Step 5: Solve for x
    x = 11,012,481.65/3,608.63
  6. Step 6: Final answer
    x = 3,051.71

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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.