Home / 2,172.71-2,997.64-1,228.41

Finding the Fourth Proportional to 2,172.71, 2,997.64 and 1,228.41

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Solution

The fourth proportional to 2,172.71, 2,997.64 and 1,228.41 is: 1,694.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.71 : 2,997.64 = 1,228.41 : x
  2. Step 2: Convert to fraction form
    2,172.71/2,997.64 = 1,228.41/x
  3. Step 3: Cross multiply
    2,172.71x = 2,997.64 × 1,228.41
  4. Step 4: Simplify right side
    2,172.71x = 3,682,327.88
  5. Step 5: Solve for x
    x = 3,682,327.88/2,172.71
  6. Step 6: Final answer
    x = 1,694.81

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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.