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Finding the Fourth Proportional to 5,739.69, 7,920.77 and 3,255.69

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Solution

The fourth proportional to 5,739.69, 7,920.77 and 3,255.69 is: 4,492.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,739.69 : 7,920.77 = 3,255.69 : x
  2. Step 2: Convert to fraction form
    5,739.69/7,920.77 = 3,255.69/x
  3. Step 3: Cross multiply
    5,739.69x = 7,920.77 × 3,255.69
  4. Step 4: Simplify right side
    5,739.69x = 25,787,571.68
  5. Step 5: Solve for x
    x = 25,787,571.68/5,739.69
  6. Step 6: Final answer
    x = 4,492.85

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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.