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Finding the Fourth Proportional to 1,906.72, 2,630.77 and 1,198.67

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Solution

The fourth proportional to 1,906.72, 2,630.77 and 1,198.67 is: 1,653.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,906.72 : 2,630.77 = 1,198.67 : x
  2. Step 2: Convert to fraction form
    1,906.72/2,630.77 = 1,198.67/x
  3. Step 3: Cross multiply
    1,906.72x = 2,630.77 × 1,198.67
  4. Step 4: Simplify right side
    1,906.72x = 3,153,425.08
  5. Step 5: Solve for x
    x = 3,153,425.08/1,906.72
  6. Step 6: Final answer
    x = 1,653.85

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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.