Home / 3,939.28-5,905.29-1,340.41

Finding the Fourth Proportional to 3,939.28, 5,905.29 and 1,340.41

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Solution

The fourth proportional to 3,939.28, 5,905.29 and 1,340.41 is: 2,009.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.28 : 5,905.29 = 1,340.41 : x
  2. Step 2: Convert to fraction form
    3,939.28/5,905.29 = 1,340.41/x
  3. Step 3: Cross multiply
    3,939.28x = 5,905.29 × 1,340.41
  4. Step 4: Simplify right side
    3,939.28x = 7,915,509.77
  5. Step 5: Solve for x
    x = 7,915,509.77/3,939.28
  6. Step 6: Final answer
    x = 2,009.38

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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.