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Finding the Fourth Proportional to 1,916.69, 2,879.13 and 1,372.37

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Solution

The fourth proportional to 1,916.69, 2,879.13 and 1,372.37 is: 2,061.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,916.69 : 2,879.13 = 1,372.37 : x
  2. Step 2: Convert to fraction form
    1,916.69/2,879.13 = 1,372.37/x
  3. Step 3: Cross multiply
    1,916.69x = 2,879.13 × 1,372.37
  4. Step 4: Simplify right side
    1,916.69x = 3,951,231.64
  5. Step 5: Solve for x
    x = 3,951,231.64/1,916.69
  6. Step 6: Final answer
    x = 2,061.49

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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.