Home / 3,917.62-5,406.79-2,239.09

Finding the Fourth Proportional to 3,917.62, 5,406.79 and 2,239.09

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Solution

The fourth proportional to 3,917.62, 5,406.79 and 2,239.09 is: 3,090.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.62 : 5,406.79 = 2,239.09 : x
  2. Step 2: Convert to fraction form
    3,917.62/5,406.79 = 2,239.09/x
  3. Step 3: Cross multiply
    3,917.62x = 5,406.79 × 2,239.09
  4. Step 4: Simplify right side
    3,917.62x = 12,106,301.77
  5. Step 5: Solve for x
    x = 12,106,301.77/3,917.62
  6. Step 6: Final answer
    x = 3,090.22

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1.5x scale

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.