Home / 1,211.97-1,818.09-379.23

Finding the Fourth Proportional to 1,211.97, 1,818.09 and 379.23

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Solution

The fourth proportional to 1,211.97, 1,818.09 and 379.23 is: 568.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.97 : 1,818.09 = 379.23 : x
  2. Step 2: Convert to fraction form
    1,211.97/1,818.09 = 379.23/x
  3. Step 3: Cross multiply
    1,211.97x = 1,818.09 × 379.23
  4. Step 4: Simplify right side
    1,211.97x = 689,474.27
  5. Step 5: Solve for x
    x = 689,474.27/1,211.97
  6. Step 6: Final answer
    x = 568.89

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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.