Home / 2,121.74-2,928.55-1,190.54

Finding the Fourth Proportional to 2,121.74, 2,928.55 and 1,190.54

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Solution

The fourth proportional to 2,121.74, 2,928.55 and 1,190.54 is: 1,643.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.74 : 2,928.55 = 1,190.54 : x
  2. Step 2: Convert to fraction form
    2,121.74/2,928.55 = 1,190.54/x
  3. Step 3: Cross multiply
    2,121.74x = 2,928.55 × 1,190.54
  4. Step 4: Simplify right side
    2,121.74x = 3,486,541.27
  5. Step 5: Solve for x
    x = 3,486,541.27/2,121.74
  6. Step 6: Final answer
    x = 1,643.25

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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.