Home / 2,918.39-4,028.87-1,979.15

Finding the Fourth Proportional to 2,918.39, 4,028.87 and 1,979.15

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Solution

The fourth proportional to 2,918.39, 4,028.87 and 1,979.15 is: 2,732.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.39 : 4,028.87 = 1,979.15 : x
  2. Step 2: Convert to fraction form
    2,918.39/4,028.87 = 1,979.15/x
  3. Step 3: Cross multiply
    2,918.39x = 4,028.87 × 1,979.15
  4. Step 4: Simplify right side
    2,918.39x = 7,973,738.06
  5. Step 5: Solve for x
    x = 7,973,738.06/2,918.39
  6. Step 6: Final answer
    x = 2,732.24

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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.