Home / 3,486.45-5,228.38-1,405.90

Finding the Fourth Proportional to 3,486.45, 5,228.38 and 1,405.90

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Solution

The fourth proportional to 3,486.45, 5,228.38 and 1,405.90 is: 2,108.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.45 : 5,228.38 = 1,405.90 : x
  2. Step 2: Convert to fraction form
    3,486.45/5,228.38 = 1,405.90/x
  3. Step 3: Cross multiply
    3,486.45x = 5,228.38 × 1,405.90
  4. Step 4: Simplify right side
    3,486.45x = 7,350,579.44
  5. Step 5: Solve for x
    x = 7,350,579.44/3,486.45
  6. Step 6: Final answer
    x = 2,108.33

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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.