Home / 3,219.80-4,829.70-3,171.20

Finding the Fourth Proportional to 3,219.80, 4,829.70 and 3,171.20

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Solution

The fourth proportional to 3,219.80, 4,829.70 and 3,171.20 is: 4,756.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.80 : 4,829.70 = 3,171.20 : x
  2. Step 2: Convert to fraction form
    3,219.80/4,829.70 = 3,171.20/x
  3. Step 3: Cross multiply
    3,219.80x = 4,829.70 × 3,171.20
  4. Step 4: Simplify right side
    3,219.80x = 15,315,944.64
  5. Step 5: Solve for x
    x = 15,315,944.64/3,219.80
  6. Step 6: Final answer
    x = 4,756.80

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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.