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Finding the Fourth Proportional to 5,717.75, 7,890.42 and 3,199.82

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Solution

The fourth proportional to 5,717.75, 7,890.42 and 3,199.82 is: 4,415.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,717.75 : 7,890.42 = 3,199.82 : x
  2. Step 2: Convert to fraction form
    5,717.75/7,890.42 = 3,199.82/x
  3. Step 3: Cross multiply
    5,717.75x = 7,890.42 × 3,199.82
  4. Step 4: Simplify right side
    5,717.75x = 25,247,923.72
  5. Step 5: Solve for x
    x = 25,247,923.72/5,717.75
  6. Step 6: Final answer
    x = 4,415.71

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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.