Home / 2,172.26-2,997.60-1,228.16

Finding the Fourth Proportional to 2,172.26, 2,997.60 and 1,228.16

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Solution

The fourth proportional to 2,172.26, 2,997.60 and 1,228.16 is: 1,694.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.26 : 2,997.60 = 1,228.16 : x
  2. Step 2: Convert to fraction form
    2,172.26/2,997.60 = 1,228.16/x
  3. Step 3: Cross multiply
    2,172.26x = 2,997.60 × 1,228.16
  4. Step 4: Simplify right side
    2,172.26x = 3,681,532.42
  5. Step 5: Solve for x
    x = 3,681,532.42/2,172.26
  6. Step 6: Final answer
    x = 1,694.79

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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.