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Finding the Fourth Proportional to 4,991.87, 7,489.98 and 2,680.67

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Solution

The fourth proportional to 4,991.87, 7,489.98 and 2,680.67 is: 4,022.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,991.87 : 7,489.98 = 2,680.67 : x
  2. Step 2: Convert to fraction form
    4,991.87/7,489.98 = 2,680.67/x
  3. Step 3: Cross multiply
    4,991.87x = 7,489.98 × 2,680.67
  4. Step 4: Simplify right side
    4,991.87x = 20,078,164.69
  5. Step 5: Solve for x
    x = 20,078,164.69/4,991.87
  6. Step 6: Final answer
    x = 4,022.17

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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.