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Finding the Fourth Proportional to 3,939.22, 5,908.24 and 1,308.56

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Solution

The fourth proportional to 3,939.22, 5,908.24 and 1,308.56 is: 1,962.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.22 : 5,908.24 = 1,308.56 : x
  2. Step 2: Convert to fraction form
    3,939.22/5,908.24 = 1,308.56/x
  3. Step 3: Cross multiply
    3,939.22x = 5,908.24 × 1,308.56
  4. Step 4: Simplify right side
    3,939.22x = 7,731,258.63
  5. Step 5: Solve for x
    x = 7,731,258.63/3,939.22
  6. Step 6: Final answer
    x = 1,962.64

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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.