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Finding the Fourth Proportional to 3,608.74, 4,979.84 and 2,116.92

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Solution

The fourth proportional to 3,608.74, 4,979.84 and 2,116.92 is: 2,921.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.74 : 4,979.84 = 2,116.92 : x
  2. Step 2: Convert to fraction form
    3,608.74/4,979.84 = 2,116.92/x
  3. Step 3: Cross multiply
    3,608.74x = 4,979.84 × 2,116.92
  4. Step 4: Simplify right side
    3,608.74x = 10,541,922.89
  5. Step 5: Solve for x
    x = 10,541,922.89/3,608.74
  6. Step 6: Final answer
    x = 2,921.22

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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.