Home / 1,233.38-1,690.95-1,211.21

Finding the Fourth Proportional to 1,233.38, 1,690.95 and 1,211.21

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Solution

The fourth proportional to 1,233.38, 1,690.95 and 1,211.21 is: 1,660.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,233.38 : 1,690.95 = 1,211.21 : x
  2. Step 2: Convert to fraction form
    1,233.38/1,690.95 = 1,211.21/x
  3. Step 3: Cross multiply
    1,233.38x = 1,690.95 × 1,211.21
  4. Step 4: Simplify right side
    1,233.38x = 2,048,087.09
  5. Step 5: Solve for x
    x = 2,048,087.09/1,233.38
  6. Step 6: Final answer
    x = 1,660.56

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.