Home / 2,190.79-3,286.07-1,223.02

Finding the Fourth Proportional to 2,190.79, 3,286.07 and 1,223.02

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Solution

The fourth proportional to 2,190.79, 3,286.07 and 1,223.02 is: 1,834.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.79 : 3,286.07 = 1,223.02 : x
  2. Step 2: Convert to fraction form
    2,190.79/3,286.07 = 1,223.02/x
  3. Step 3: Cross multiply
    2,190.79x = 3,286.07 × 1,223.02
  4. Step 4: Simplify right side
    2,190.79x = 4,018,906.79
  5. Step 5: Solve for x
    x = 4,018,906.79/2,190.79
  6. Step 6: Final answer
    x = 1,834.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.