Home / 3,868.20-5,802.30-2,782.80

Finding the Fourth Proportional to 3,868.20, 5,802.30 and 2,782.80

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Solution

The fourth proportional to 3,868.20, 5,802.30 and 2,782.80 is: 4,174.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,868.20 : 5,802.30 = 2,782.80 : x
  2. Step 2: Convert to fraction form
    3,868.20/5,802.30 = 2,782.80/x
  3. Step 3: Cross multiply
    3,868.20x = 5,802.30 × 2,782.80
  4. Step 4: Simplify right side
    3,868.20x = 16,146,640.44
  5. Step 5: Solve for x
    x = 16,146,640.44/3,868.20
  6. Step 6: Final answer
    x = 4,174.20

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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.