Home / 3,128.20-4,686.90-1,481.20

Finding the Fourth Proportional to 3,128.20, 4,686.90 and 1,481.20

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Solution

The fourth proportional to 3,128.20, 4,686.90 and 1,481.20 is: 2,219.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.20 : 4,686.90 = 1,481.20 : x
  2. Step 2: Convert to fraction form
    3,128.20/4,686.90 = 1,481.20/x
  3. Step 3: Cross multiply
    3,128.20x = 4,686.90 × 1,481.20
  4. Step 4: Simplify right side
    3,128.20x = 6,942,236.28
  5. Step 5: Solve for x
    x = 6,942,236.28/3,128.20
  6. Step 6: Final answer
    x = 2,219.24

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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.