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Finding the Fourth Proportional to 1,922.43, 2,879.85 and 998.59

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Solution

The fourth proportional to 1,922.43, 2,879.85 and 998.59 is: 1,495.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,922.43 : 2,879.85 = 998.59 : x
  2. Step 2: Convert to fraction form
    1,922.43/2,879.85 = 998.59/x
  3. Step 3: Cross multiply
    1,922.43x = 2,879.85 × 998.59
  4. Step 4: Simplify right side
    1,922.43x = 2,875,789.41
  5. Step 5: Solve for x
    x = 2,875,789.41/1,922.43
  6. Step 6: Final answer
    x = 1,495.91

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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.