Home / 3,218.78-4,442.25-1,821.98

Finding the Fourth Proportional to 3,218.78, 4,442.25 and 1,821.98

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Solution

The fourth proportional to 3,218.78, 4,442.25 and 1,821.98 is: 2,514.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.78 : 4,442.25 = 1,821.98 : x
  2. Step 2: Convert to fraction form
    3,218.78/4,442.25 = 1,821.98/x
  3. Step 3: Cross multiply
    3,218.78x = 4,442.25 × 1,821.98
  4. Step 4: Simplify right side
    3,218.78x = 8,093,690.66
  5. Step 5: Solve for x
    x = 8,093,690.66/3,218.78
  6. Step 6: Final answer
    x = 2,514.52

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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.