Home / 2,172.92-2,997.63-1,288.22

Finding the Fourth Proportional to 2,172.92, 2,997.63 and 1,288.22

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Solution

The fourth proportional to 2,172.92, 2,997.63 and 1,288.22 is: 1,777.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.92 : 2,997.63 = 1,288.22 : x
  2. Step 2: Convert to fraction form
    2,172.92/2,997.63 = 1,288.22/x
  3. Step 3: Cross multiply
    2,172.92x = 2,997.63 × 1,288.22
  4. Step 4: Simplify right side
    2,172.92x = 3,861,591.93
  5. Step 5: Solve for x
    x = 3,861,591.93/2,172.92
  6. Step 6: Final answer
    x = 1,777.15

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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.