Home / 2,122.67-2,928.97-1,190.99

Finding the Fourth Proportional to 2,122.67, 2,928.97 and 1,190.99

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Solution

The fourth proportional to 2,122.67, 2,928.97 and 1,190.99 is: 1,643.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.67 : 2,928.97 = 1,190.99 : x
  2. Step 2: Convert to fraction form
    2,122.67/2,928.97 = 1,190.99/x
  3. Step 3: Cross multiply
    2,122.67x = 2,928.97 × 1,190.99
  4. Step 4: Simplify right side
    2,122.67x = 3,488,378.33
  5. Step 5: Solve for x
    x = 3,488,378.33/2,122.67
  6. Step 6: Final answer
    x = 1,643.39

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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.