Home / 2,718.14-4,078.85-986.90

Finding the Fourth Proportional to 2,718.14, 4,078.85 and 986.90

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Solution

The fourth proportional to 2,718.14, 4,078.85 and 986.90 is: 1,480.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,718.14 : 4,078.85 = 986.90 : x
  2. Step 2: Convert to fraction form
    2,718.14/4,078.85 = 986.90/x
  3. Step 3: Cross multiply
    2,718.14x = 4,078.85 × 986.90
  4. Step 4: Simplify right side
    2,718.14x = 4,025,391.74
  5. Step 5: Solve for x
    x = 4,025,391.74/2,718.14
  6. Step 6: Final answer
    x = 1,480.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.