Home / 2,172.68-2,997.57-1,228.35

Finding the Fourth Proportional to 2,172.68, 2,997.57 and 1,228.35

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Solution

The fourth proportional to 2,172.68, 2,997.57 and 1,228.35 is: 1,694.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.68 : 2,997.57 = 1,228.35 : x
  2. Step 2: Convert to fraction form
    2,172.68/2,997.57 = 1,228.35/x
  3. Step 3: Cross multiply
    2,172.68x = 2,997.57 × 1,228.35
  4. Step 4: Simplify right side
    2,172.68x = 3,682,065.11
  5. Step 5: Solve for x
    x = 3,682,065.11/2,172.68
  6. Step 6: Final answer
    x = 1,694.71

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1.5x scale

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.