Home / 3,120.63-4,680.91-1,271.31

Finding the Fourth Proportional to 3,120.63, 4,680.91 and 1,271.31

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Solution

The fourth proportional to 3,120.63, 4,680.91 and 1,271.31 is: 1,906.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.63 : 4,680.91 = 1,271.31 : x
  2. Step 2: Convert to fraction form
    3,120.63/4,680.91 = 1,271.31/x
  3. Step 3: Cross multiply
    3,120.63x = 4,680.91 × 1,271.31
  4. Step 4: Simplify right side
    3,120.63x = 5,950,887.69
  5. Step 5: Solve for x
    x = 5,950,887.69/3,120.63
  6. Step 6: Final answer
    x = 1,906.95

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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.