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Finding the Fourth Proportional to 5,219.80, 7,829.73 and 1,324.22

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Solution

The fourth proportional to 5,219.80, 7,829.73 and 1,324.22 is: 1,986.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,219.80 : 7,829.73 = 1,324.22 : x
  2. Step 2: Convert to fraction form
    5,219.80/7,829.73 = 1,324.22/x
  3. Step 3: Cross multiply
    5,219.80x = 7,829.73 × 1,324.22
  4. Step 4: Simplify right side
    5,219.80x = 10,368,245.91
  5. Step 5: Solve for x
    x = 10,368,245.91/5,219.80
  6. Step 6: Final answer
    x = 1,986.33

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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.