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Finding the Fourth Proportional to 1,920.81, 2,879.42 and 1,749.62

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Solution

The fourth proportional to 1,920.81, 2,879.42 and 1,749.62 is: 2,622.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.81 : 2,879.42 = 1,749.62 : x
  2. Step 2: Convert to fraction form
    1,920.81/2,879.42 = 1,749.62/x
  3. Step 3: Cross multiply
    1,920.81x = 2,879.42 × 1,749.62
  4. Step 4: Simplify right side
    1,920.81x = 5,037,889.27
  5. Step 5: Solve for x
    x = 5,037,889.27/1,920.81
  6. Step 6: Final answer
    x = 2,622.79

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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.