Home / 2,188.20-3,280.21-726.33

Finding the Fourth Proportional to 2,188.20, 3,280.21 and 726.33

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Solution

The fourth proportional to 2,188.20, 3,280.21 and 726.33 is: 1,088.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.20 : 3,280.21 = 726.33 : x
  2. Step 2: Convert to fraction form
    2,188.20/3,280.21 = 726.33/x
  3. Step 3: Cross multiply
    2,188.20x = 3,280.21 × 726.33
  4. Step 4: Simplify right side
    2,188.20x = 2,382,525.41
  5. Step 5: Solve for x
    x = 2,382,525.41/2,188.20
  6. Step 6: Final answer
    x = 1,088.80

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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.