Home / 1,815.72-2,723.66-1,121.96

Finding the Fourth Proportional to 1,815.72, 2,723.66 and 1,121.96

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Solution

The fourth proportional to 1,815.72, 2,723.66 and 1,121.96 is: 1,682.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.72 : 2,723.66 = 1,121.96 : x
  2. Step 2: Convert to fraction form
    1,815.72/2,723.66 = 1,121.96/x
  3. Step 3: Cross multiply
    1,815.72x = 2,723.66 × 1,121.96
  4. Step 4: Simplify right side
    1,815.72x = 3,055,837.57
  5. Step 5: Solve for x
    x = 3,055,837.57/1,815.72
  6. Step 6: Final answer
    x = 1,682.99

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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.