Home / 2,107.06-3,161.20-646.43

Finding the Fourth Proportional to 2,107.06, 3,161.20 and 646.43

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Solution

The fourth proportional to 2,107.06, 3,161.20 and 646.43 is: 969.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.06 : 3,161.20 = 646.43 : x
  2. Step 2: Convert to fraction form
    2,107.06/3,161.20 = 646.43/x
  3. Step 3: Cross multiply
    2,107.06x = 3,161.20 × 646.43
  4. Step 4: Simplify right side
    2,107.06x = 2,043,497.91
  5. Step 5: Solve for x
    x = 2,043,497.91/2,107.06
  6. Step 6: Final answer
    x = 969.83

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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.