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Finding the Fourth Proportional to 1,218.88, 1,826.34 and 827.38

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Solution

The fourth proportional to 1,218.88, 1,826.34 and 827.38 is: 1,239.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.88 : 1,826.34 = 827.38 : x
  2. Step 2: Convert to fraction form
    1,218.88/1,826.34 = 827.38/x
  3. Step 3: Cross multiply
    1,218.88x = 1,826.34 × 827.38
  4. Step 4: Simplify right side
    1,218.88x = 1,511,077.19
  5. Step 5: Solve for x
    x = 1,511,077.19/1,218.88
  6. Step 6: Final answer
    x = 1,239.73

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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.