Home / 2,986.98-4,121.97-1,868.40

Finding the Fourth Proportional to 2,986.98, 4,121.97 and 1,868.40

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Solution

The fourth proportional to 2,986.98, 4,121.97 and 1,868.40 is: 2,578.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.98 : 4,121.97 = 1,868.40 : x
  2. Step 2: Convert to fraction form
    2,986.98/4,121.97 = 1,868.40/x
  3. Step 3: Cross multiply
    2,986.98x = 4,121.97 × 1,868.40
  4. Step 4: Simplify right side
    2,986.98x = 7,701,488.75
  5. Step 5: Solve for x
    x = 7,701,488.75/2,986.98
  6. Step 6: Final answer
    x = 2,578.35

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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.