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Finding the Fourth Proportional to 2,198.89, 3,298.32 and 659.89

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Solution

The fourth proportional to 2,198.89, 3,298.32 and 659.89 is: 989.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,198.89 : 3,298.32 = 659.89 : x
  2. Step 2: Convert to fraction form
    2,198.89/3,298.32 = 659.89/x
  3. Step 3: Cross multiply
    2,198.89x = 3,298.32 × 659.89
  4. Step 4: Simplify right side
    2,198.89x = 2,176,528.38
  5. Step 5: Solve for x
    x = 2,176,528.38/2,198.89
  6. Step 6: Final answer
    x = 989.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.