Home / 2,979.23-4,109.49-1,916.64

Finding the Fourth Proportional to 2,979.23, 4,109.49 and 1,916.64

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Solution

The fourth proportional to 2,979.23, 4,109.49 and 1,916.64 is: 2,643.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.23 : 4,109.49 = 1,916.64 : x
  2. Step 2: Convert to fraction form
    2,979.23/4,109.49 = 1,916.64/x
  3. Step 3: Cross multiply
    2,979.23x = 4,109.49 × 1,916.64
  4. Step 4: Simplify right side
    2,979.23x = 7,876,412.91
  5. Step 5: Solve for x
    x = 7,876,412.91/2,979.23
  6. Step 6: Final answer
    x = 2,643.78

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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.