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Finding the Fourth Proportional to 1,999.82, 2,998.92 and 683.30

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Solution

The fourth proportional to 1,999.82, 2,998.92 and 683.30 is: 1,024.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.82 : 2,998.92 = 683.30 : x
  2. Step 2: Convert to fraction form
    1,999.82/2,998.92 = 683.30/x
  3. Step 3: Cross multiply
    1,999.82x = 2,998.92 × 683.30
  4. Step 4: Simplify right side
    1,999.82x = 2,049,162.04
  5. Step 5: Solve for x
    x = 2,049,162.04/1,999.82
  6. Step 6: Final answer
    x = 1,024.67

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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.