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Finding the Fourth Proportional to 5,230.80, 7,846.20 and 5,198.40

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Solution

The fourth proportional to 5,230.80, 7,846.20 and 5,198.40 is: 7,797.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,230.80 : 7,846.20 = 5,198.40 : x
  2. Step 2: Convert to fraction form
    5,230.80/7,846.20 = 5,198.40/x
  3. Step 3: Cross multiply
    5,230.80x = 7,846.20 × 5,198.40
  4. Step 4: Simplify right side
    5,230.80x = 40,787,686.08
  5. Step 5: Solve for x
    x = 40,787,686.08/5,230.80
  6. Step 6: Final answer
    x = 7,797.60

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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.