Home / 1,081.11-1,621.61-350.67

Finding the Fourth Proportional to 1,081.11, 1,621.61 and 350.67

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Solution

The fourth proportional to 1,081.11, 1,621.61 and 350.67 is: 525.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.11 : 1,621.61 = 350.67 : x
  2. Step 2: Convert to fraction form
    1,081.11/1,621.61 = 350.67/x
  3. Step 3: Cross multiply
    1,081.11x = 1,621.61 × 350.67
  4. Step 4: Simplify right side
    1,081.11x = 568,648.23
  5. Step 5: Solve for x
    x = 568,648.23/1,081.11
  6. Step 6: Final answer
    x = 525.99

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Double scale
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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.