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Finding the Fourth Proportional to 1,961.65, 2,704.43 and 1,680.67

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Solution

The fourth proportional to 1,961.65, 2,704.43 and 1,680.67 is: 2,317.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.65 : 2,704.43 = 1,680.67 : x
  2. Step 2: Convert to fraction form
    1,961.65/2,704.43 = 1,680.67/x
  3. Step 3: Cross multiply
    1,961.65x = 2,704.43 × 1,680.67
  4. Step 4: Simplify right side
    1,961.65x = 4,545,232.44
  5. Step 5: Solve for x
    x = 4,545,232.44/1,961.65
  6. Step 6: Final answer
    x = 2,317.05

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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.