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Finding the Fourth Proportional to 3,326.80, 4,990.20 and 2,792.20

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Solution

The fourth proportional to 3,326.80, 4,990.20 and 2,792.20 is: 4,188.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,326.80 : 4,990.20 = 2,792.20 : x
  2. Step 2: Convert to fraction form
    3,326.80/4,990.20 = 2,792.20/x
  3. Step 3: Cross multiply
    3,326.80x = 4,990.20 × 2,792.20
  4. Step 4: Simplify right side
    3,326.80x = 13,933,636.44
  5. Step 5: Solve for x
    x = 13,933,636.44/3,326.80
  6. Step 6: Final answer
    x = 4,188.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.