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Finding the Fourth Proportional to 5,679.89, 8,519.88 and 1,982.19

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Solution

The fourth proportional to 5,679.89, 8,519.88 and 1,982.19 is: 2,973.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,679.89 : 8,519.88 = 1,982.19 : x
  2. Step 2: Convert to fraction form
    5,679.89/8,519.88 = 1,982.19/x
  3. Step 3: Cross multiply
    5,679.89x = 8,519.88 × 1,982.19
  4. Step 4: Simplify right side
    5,679.89x = 16,888,020.94
  5. Step 5: Solve for x
    x = 16,888,020.94/5,679.89
  6. Step 6: Final answer
    x = 2,973.30

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Similar ratio
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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.