Home / 4,119.78-6,179.40-1,779.72

Finding the Fourth Proportional to 4,119.78, 6,179.40 and 1,779.72

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Solution

The fourth proportional to 4,119.78, 6,179.40 and 1,779.72 is: 2,669.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,119.78 : 6,179.40 = 1,779.72 : x
  2. Step 2: Convert to fraction form
    4,119.78/6,179.40 = 1,779.72/x
  3. Step 3: Cross multiply
    4,119.78x = 6,179.40 × 1,779.72
  4. Step 4: Simplify right side
    4,119.78x = 10,997,601.77
  5. Step 5: Solve for x
    x = 10,997,601.77/4,119.78
  6. Step 6: Final answer
    x = 2,669.46

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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.