Home / 3,211.85-4,817.79-1,020.80

Finding the Fourth Proportional to 3,211.85, 4,817.79 and 1,020.80

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Solution

The fourth proportional to 3,211.85, 4,817.79 and 1,020.80 is: 1,531.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.85 : 4,817.79 = 1,020.80 : x
  2. Step 2: Convert to fraction form
    3,211.85/4,817.79 = 1,020.80/x
  3. Step 3: Cross multiply
    3,211.85x = 4,817.79 × 1,020.80
  4. Step 4: Simplify right side
    3,211.85x = 4,918,000.03
  5. Step 5: Solve for x
    x = 4,918,000.03/3,211.85
  6. Step 6: Final answer
    x = 1,531.20

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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.