Home / 1,918.29-2,647.18-1,078.97

Finding the Fourth Proportional to 1,918.29, 2,647.18 and 1,078.97

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Solution

The fourth proportional to 1,918.29, 2,647.18 and 1,078.97 is: 1,488.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.29 : 2,647.18 = 1,078.97 : x
  2. Step 2: Convert to fraction form
    1,918.29/2,647.18 = 1,078.97/x
  3. Step 3: Cross multiply
    1,918.29x = 2,647.18 × 1,078.97
  4. Step 4: Simplify right side
    1,918.29x = 2,856,227.80
  5. Step 5: Solve for x
    x = 2,856,227.80/1,918.29
  6. Step 6: Final answer
    x = 1,488.94

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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.