Home / 1,081.20-1,621.82-350.85

Finding the Fourth Proportional to 1,081.20, 1,621.82 and 350.85

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Solution

The fourth proportional to 1,081.20, 1,621.82 and 350.85 is: 526.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.20 : 1,621.82 = 350.85 : x
  2. Step 2: Convert to fraction form
    1,081.20/1,621.82 = 350.85/x
  3. Step 3: Cross multiply
    1,081.20x = 1,621.82 × 350.85
  4. Step 4: Simplify right side
    1,081.20x = 569,015.55
  5. Step 5: Solve for x
    x = 569,015.55/1,081.20
  6. Step 6: Final answer
    x = 526.28

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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.