Home / 2,979.91-4,110.31-1,917.26

Finding the Fourth Proportional to 2,979.91, 4,110.31 and 1,917.26

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Solution

The fourth proportional to 2,979.91, 4,110.31 and 1,917.26 is: 2,644.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.91 : 4,110.31 = 1,917.26 : x
  2. Step 2: Convert to fraction form
    2,979.91/4,110.31 = 1,917.26/x
  3. Step 3: Cross multiply
    2,979.91x = 4,110.31 × 1,917.26
  4. Step 4: Simplify right side
    2,979.91x = 7,880,532.95
  5. Step 5: Solve for x
    x = 7,880,532.95/2,979.91
  6. Step 6: Final answer
    x = 2,644.55

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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.