Home / 4,278.78-6,418.55-1,779.44

Finding the Fourth Proportional to 4,278.78, 6,418.55 and 1,779.44

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Solution

The fourth proportional to 4,278.78, 6,418.55 and 1,779.44 is: 2,669.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,278.78 : 6,418.55 = 1,779.44 : x
  2. Step 2: Convert to fraction form
    4,278.78/6,418.55 = 1,779.44/x
  3. Step 3: Cross multiply
    4,278.78x = 6,418.55 × 1,779.44
  4. Step 4: Simplify right side
    4,278.78x = 11,421,396.97
  5. Step 5: Solve for x
    x = 11,421,396.97/4,278.78
  6. Step 6: Final answer
    x = 2,669.31

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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.