Home / 3,917.90-5,406.31-2,239.72

Finding the Fourth Proportional to 3,917.90, 5,406.31 and 2,239.72

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Solution

The fourth proportional to 3,917.90, 5,406.31 and 2,239.72 is: 3,090.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.90 : 5,406.31 = 2,239.72 : x
  2. Step 2: Convert to fraction form
    3,917.90/5,406.31 = 2,239.72/x
  3. Step 3: Cross multiply
    3,917.90x = 5,406.31 × 2,239.72
  4. Step 4: Simplify right side
    3,917.90x = 12,108,620.63
  5. Step 5: Solve for x
    x = 12,108,620.63/3,917.90
  6. Step 6: Final answer
    x = 3,090.59

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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.