Home / 2,928.78-4,040.90-1,749.42

Finding the Fourth Proportional to 2,928.78, 4,040.90 and 1,749.42

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Solution

The fourth proportional to 2,928.78, 4,040.90 and 1,749.42 is: 2,413.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.78 : 4,040.90 = 1,749.42 : x
  2. Step 2: Convert to fraction form
    2,928.78/4,040.90 = 1,749.42/x
  3. Step 3: Cross multiply
    2,928.78x = 4,040.90 × 1,749.42
  4. Step 4: Simplify right side
    2,928.78x = 7,069,231.28
  5. Step 5: Solve for x
    x = 7,069,231.28/2,928.78
  6. Step 6: Final answer
    x = 2,413.71

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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.