Home / 1,815.28-2,723.55-1,121.14

Finding the Fourth Proportional to 1,815.28, 2,723.55 and 1,121.14

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Solution

The fourth proportional to 1,815.28, 2,723.55 and 1,121.14 is: 1,682.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.28 : 2,723.55 = 1,121.14 : x
  2. Step 2: Convert to fraction form
    1,815.28/2,723.55 = 1,121.14/x
  3. Step 3: Cross multiply
    1,815.28x = 2,723.55 × 1,121.14
  4. Step 4: Simplify right side
    1,815.28x = 3,053,480.85
  5. Step 5: Solve for x
    x = 3,053,480.85/1,815.28
  6. Step 6: Final answer
    x = 1,682.10

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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.