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Finding the Fourth Proportional to 4,990.62, 6,879.90 and 3,926.55

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Solution

The fourth proportional to 4,990.62, 6,879.90 and 3,926.55 is: 5,413.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.62 : 6,879.90 = 3,926.55 : x
  2. Step 2: Convert to fraction form
    4,990.62/6,879.90 = 3,926.55/x
  3. Step 3: Cross multiply
    4,990.62x = 6,879.90 × 3,926.55
  4. Step 4: Simplify right side
    4,990.62x = 27,014,234.51
  5. Step 5: Solve for x
    x = 27,014,234.51/4,990.62
  6. Step 6: Final answer
    x = 5,413.00

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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.