Home / 2,192.50-3,289.20-711.80

Finding the Fourth Proportional to 2,192.50, 3,289.20 and 711.80

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Solution

The fourth proportional to 2,192.50, 3,289.20 and 711.80 is: 1,067.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,192.50 : 3,289.20 = 711.80 : x
  2. Step 2: Convert to fraction form
    2,192.50/3,289.20 = 711.80/x
  3. Step 3: Cross multiply
    2,192.50x = 3,289.20 × 711.80
  4. Step 4: Simplify right side
    2,192.50x = 2,341,252.56
  5. Step 5: Solve for x
    x = 2,341,252.56/2,192.50
  6. Step 6: Final answer
    x = 1,067.85

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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.