Home / 3,905.56-5,387.34-3,380.68

Finding the Fourth Proportional to 3,905.56, 5,387.34 and 3,380.68

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Solution

The fourth proportional to 3,905.56, 5,387.34 and 3,380.68 is: 4,663.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.56 : 5,387.34 = 3,380.68 : x
  2. Step 2: Convert to fraction form
    3,905.56/5,387.34 = 3,380.68/x
  3. Step 3: Cross multiply
    3,905.56x = 5,387.34 × 3,380.68
  4. Step 4: Simplify right side
    3,905.56x = 18,212,872.59
  5. Step 5: Solve for x
    x = 18,212,872.59/3,905.56
  6. Step 6: Final answer
    x = 4,663.32

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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.