Home / 3,420.86-4,721.96-2,005

Finding the Fourth Proportional to 3,420.86, 4,721.96 and 2,005

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Solution

The fourth proportional to 3,420.86, 4,721.96 and 2,005 is: 2,767.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.86 : 4,721.96 = 2,005 : x
  2. Step 2: Convert to fraction form
    3,420.86/4,721.96 = 2,005/x
  3. Step 3: Cross multiply
    3,420.86x = 4,721.96 × 2,005
  4. Step 4: Simplify right side
    3,420.86x = 9,467,529.80
  5. Step 5: Solve for x
    x = 9,467,529.80/3,420.86
  6. Step 6: Final answer
    x = 2,767.59

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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.