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Finding the Fourth Proportional to 3,608.62, 4,979.93 and 2,116.58

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Solution

The fourth proportional to 3,608.62, 4,979.93 and 2,116.58 is: 2,920.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,608.62 : 4,979.93 = 2,116.58 : x
  2. Step 2: Convert to fraction form
    3,608.62/4,979.93 = 2,116.58/x
  3. Step 3: Cross multiply
    3,608.62x = 4,979.93 × 2,116.58
  4. Step 4: Simplify right side
    3,608.62x = 10,540,420.24
  5. Step 5: Solve for x
    x = 10,540,420.24/3,608.62
  6. Step 6: Final answer
    x = 2,920.90

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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.