Home / 1,215.20-1,825.13-1,119.22

Finding the Fourth Proportional to 1,215.20, 1,825.13 and 1,119.22

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Solution

The fourth proportional to 1,215.20, 1,825.13 and 1,119.22 is: 1,680.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.20 : 1,825.13 = 1,119.22 : x
  2. Step 2: Convert to fraction form
    1,215.20/1,825.13 = 1,119.22/x
  3. Step 3: Cross multiply
    1,215.20x = 1,825.13 × 1,119.22
  4. Step 4: Simplify right side
    1,215.20x = 2,042,720.23
  5. Step 5: Solve for x
    x = 2,042,720.23/1,215.20
  6. Step 6: Final answer
    x = 1,680.97

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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.