Home / 1,227.22-1,688.60-1,198.06

Finding the Fourth Proportional to 1,227.22, 1,688.60 and 1,198.06

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Solution

The fourth proportional to 1,227.22, 1,688.60 and 1,198.06 is: 1,648.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227.22 : 1,688.60 = 1,198.06 : x
  2. Step 2: Convert to fraction form
    1,227.22/1,688.60 = 1,198.06/x
  3. Step 3: Cross multiply
    1,227.22x = 1,688.60 × 1,198.06
  4. Step 4: Simplify right side
    1,227.22x = 2,023,044.12
  5. Step 5: Solve for x
    x = 2,023,044.12/1,227.22
  6. Step 6: Final answer
    x = 1,648.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.