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Finding the Fourth Proportional to 3,920.85, 5,909.46 and 3,379.57

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Solution

The fourth proportional to 3,920.85, 5,909.46 and 3,379.57 is: 5,093.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.85 : 5,909.46 = 3,379.57 : x
  2. Step 2: Convert to fraction form
    3,920.85/5,909.46 = 3,379.57/x
  3. Step 3: Cross multiply
    3,920.85x = 5,909.46 × 3,379.57
  4. Step 4: Simplify right side
    3,920.85x = 19,971,442.18
  5. Step 5: Solve for x
    x = 19,971,442.18/3,920.85
  6. Step 6: Final answer
    x = 5,093.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.