Home / 3,120.49-4,680.64-1,271.15

Finding the Fourth Proportional to 3,120.49, 4,680.64 and 1,271.15

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Solution

The fourth proportional to 3,120.49, 4,680.64 and 1,271.15 is: 1,906.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.49 : 4,680.64 = 1,271.15 : x
  2. Step 2: Convert to fraction form
    3,120.49/4,680.64 = 1,271.15/x
  3. Step 3: Cross multiply
    3,120.49x = 4,680.64 × 1,271.15
  4. Step 4: Simplify right side
    3,120.49x = 5,949,772.13
  5. Step 5: Solve for x
    x = 5,949,772.13/3,120.49
  6. Step 6: Final answer
    x = 1,906.68

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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.