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Finding the Fourth Proportional to 3,917.83, 5,406.56 and 2,239.22

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Solution

The fourth proportional to 3,917.83, 5,406.56 and 2,239.22 is: 3,090.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.83 : 5,406.56 = 2,239.22 : x
  2. Step 2: Convert to fraction form
    3,917.83/5,406.56 = 2,239.22/x
  3. Step 3: Cross multiply
    3,917.83x = 5,406.56 × 2,239.22
  4. Step 4: Simplify right side
    3,917.83x = 12,106,466.09
  5. Step 5: Solve for x
    x = 12,106,466.09/3,917.83
  6. Step 6: Final answer
    x = 3,090.09

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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.