Home / 3,240.40-4,870.20-3,182.80

Finding the Fourth Proportional to 3,240.40, 4,870.20 and 3,182.80

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Solution

The fourth proportional to 3,240.40, 4,870.20 and 3,182.80 is: 4,783.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240.40 : 4,870.20 = 3,182.80 : x
  2. Step 2: Convert to fraction form
    3,240.40/4,870.20 = 3,182.80/x
  3. Step 3: Cross multiply
    3,240.40x = 4,870.20 × 3,182.80
  4. Step 4: Simplify right side
    3,240.40x = 15,500,872.56
  5. Step 5: Solve for x
    x = 15,500,872.56/3,240.40
  6. Step 6: Final answer
    x = 4,783.63

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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.