Home / 3,121.96-4,308.28-1,724.72

Finding the Fourth Proportional to 3,121.96, 4,308.28 and 1,724.72

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Solution

The fourth proportional to 3,121.96, 4,308.28 and 1,724.72 is: 2,380.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.96 : 4,308.28 = 1,724.72 : x
  2. Step 2: Convert to fraction form
    3,121.96/4,308.28 = 1,724.72/x
  3. Step 3: Cross multiply
    3,121.96x = 4,308.28 × 1,724.72
  4. Step 4: Simplify right side
    3,121.96x = 7,430,576.68
  5. Step 5: Solve for x
    x = 7,430,576.68/3,121.96
  6. Step 6: Final answer
    x = 2,380.10

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1.5x scale

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.