Home / 1,081.58-1,621.67-388.22

Finding the Fourth Proportional to 1,081.58, 1,621.67 and 388.22

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Solution

The fourth proportional to 1,081.58, 1,621.67 and 388.22 is: 582.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.58 : 1,621.67 = 388.22 : x
  2. Step 2: Convert to fraction form
    1,081.58/1,621.67 = 388.22/x
  3. Step 3: Cross multiply
    1,081.58x = 1,621.67 × 388.22
  4. Step 4: Simplify right side
    1,081.58x = 629,554.68
  5. Step 5: Solve for x
    x = 629,554.68/1,081.58
  6. Step 6: Final answer
    x = 582.07

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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.