Home / 3,081.90-4,621.32-1,326.72

Finding the Fourth Proportional to 3,081.90, 4,621.32 and 1,326.72

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Solution

The fourth proportional to 3,081.90, 4,621.32 and 1,326.72 is: 1,989.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.90 : 4,621.32 = 1,326.72 : x
  2. Step 2: Convert to fraction form
    3,081.90/4,621.32 = 1,326.72/x
  3. Step 3: Cross multiply
    3,081.90x = 4,621.32 × 1,326.72
  4. Step 4: Simplify right side
    3,081.90x = 6,131,197.67
  5. Step 5: Solve for x
    x = 6,131,197.67/3,081.90
  6. Step 6: Final answer
    x = 1,989.42

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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.