Home / 3,318.55-4,578.07-1,989.95

Finding the Fourth Proportional to 3,318.55, 4,578.07 and 1,989.95

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Solution

The fourth proportional to 3,318.55, 4,578.07 and 1,989.95 is: 2,745.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.55 : 4,578.07 = 1,989.95 : x
  2. Step 2: Convert to fraction form
    3,318.55/4,578.07 = 1,989.95/x
  3. Step 3: Cross multiply
    3,318.55x = 4,578.07 × 1,989.95
  4. Step 4: Simplify right side
    3,318.55x = 9,110,132.01
  5. Step 5: Solve for x
    x = 9,110,132.01/3,318.55
  6. Step 6: Final answer
    x = 2,745.21

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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.