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Finding the Fourth Proportional to 1,081.58, 1,621.37 and 350.78

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Solution

The fourth proportional to 1,081.58, 1,621.37 and 350.78 is: 525.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.58 : 1,621.37 = 350.78 : x
  2. Step 2: Convert to fraction form
    1,081.58/1,621.37 = 350.78/x
  3. Step 3: Cross multiply
    1,081.58x = 1,621.37 × 350.78
  4. Step 4: Simplify right side
    1,081.58x = 568,736.94
  5. Step 5: Solve for x
    x = 568,736.94/1,081.58
  6. Step 6: Final answer
    x = 525.84

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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.