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Finding the Fourth Proportional to 3,939.22, 5,909.10 and 1,341.28

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Solution

The fourth proportional to 3,939.22, 5,909.10 and 1,341.28 is: 2,012.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.22 : 5,909.10 = 1,341.28 : x
  2. Step 2: Convert to fraction form
    3,939.22/5,909.10 = 1,341.28/x
  3. Step 3: Cross multiply
    3,939.22x = 5,909.10 × 1,341.28
  4. Step 4: Simplify right side
    3,939.22x = 7,925,757.65
  5. Step 5: Solve for x
    x = 7,925,757.65/3,939.22
  6. Step 6: Final answer
    x = 2,012.01

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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.