Home / 2,172.18-2,997.09-1,227.99

Finding the Fourth Proportional to 2,172.18, 2,997.09 and 1,227.99

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Solution

The fourth proportional to 2,172.18, 2,997.09 and 1,227.99 is: 1,694.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.18 : 2,997.09 = 1,227.99 : x
  2. Step 2: Convert to fraction form
    2,172.18/2,997.09 = 1,227.99/x
  3. Step 3: Cross multiply
    2,172.18x = 2,997.09 × 1,227.99
  4. Step 4: Simplify right side
    2,172.18x = 3,680,396.55
  5. Step 5: Solve for x
    x = 3,680,396.55/2,172.18
  6. Step 6: Final answer
    x = 1,694.33

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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.