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Finding the Fourth Proportional to 3,616.70, 4,990.40 and 2,199.94

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Solution

The fourth proportional to 3,616.70, 4,990.40 and 2,199.94 is: 3,035.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,616.70 : 4,990.40 = 2,199.94 : x
  2. Step 2: Convert to fraction form
    3,616.70/4,990.40 = 2,199.94/x
  3. Step 3: Cross multiply
    3,616.70x = 4,990.40 × 2,199.94
  4. Step 4: Simplify right side
    3,616.70x = 10,978,580.58
  5. Step 5: Solve for x
    x = 10,978,580.58/3,616.70
  6. Step 6: Final answer
    x = 3,035.52

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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.