Home / 1,992.62-2,749.59-1,206.78

Finding the Fourth Proportional to 1,992.62, 2,749.59 and 1,206.78

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Solution

The fourth proportional to 1,992.62, 2,749.59 and 1,206.78 is: 1,665.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.62 : 2,749.59 = 1,206.78 : x
  2. Step 2: Convert to fraction form
    1,992.62/2,749.59 = 1,206.78/x
  3. Step 3: Cross multiply
    1,992.62x = 2,749.59 × 1,206.78
  4. Step 4: Simplify right side
    1,992.62x = 3,318,150.22
  5. Step 5: Solve for x
    x = 3,318,150.22/1,992.62
  6. Step 6: Final answer
    x = 1,665.22

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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.