Home / 3,405.18-5,107.82-939.98

Finding the Fourth Proportional to 3,405.18, 5,107.82 and 939.98

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Solution

The fourth proportional to 3,405.18, 5,107.82 and 939.98 is: 1,409.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.18 : 5,107.82 = 939.98 : x
  2. Step 2: Convert to fraction form
    3,405.18/5,107.82 = 939.98/x
  3. Step 3: Cross multiply
    3,405.18x = 5,107.82 × 939.98
  4. Step 4: Simplify right side
    3,405.18x = 4,801,218.40
  5. Step 5: Solve for x
    x = 4,801,218.40/3,405.18
  6. Step 6: Final answer
    x = 1,409.97

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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.