Home / 3,178.80-4,768.20-2,838.60

Finding the Fourth Proportional to 3,178.80, 4,768.20 and 2,838.60

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Solution

The fourth proportional to 3,178.80, 4,768.20 and 2,838.60 is: 4,257.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.80 : 4,768.20 = 2,838.60 : x
  2. Step 2: Convert to fraction form
    3,178.80/4,768.20 = 2,838.60/x
  3. Step 3: Cross multiply
    3,178.80x = 4,768.20 × 2,838.60
  4. Step 4: Simplify right side
    3,178.80x = 13,535,012.52
  5. Step 5: Solve for x
    x = 13,535,012.52/3,178.80
  6. Step 6: Final answer
    x = 4,257.90

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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.