Home / 3,121.94-4,308.45-1,724.66

Finding the Fourth Proportional to 3,121.94, 4,308.45 and 1,724.66

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Solution

The fourth proportional to 3,121.94, 4,308.45 and 1,724.66 is: 2,380.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.94 : 4,308.45 = 1,724.66 : x
  2. Step 2: Convert to fraction form
    3,121.94/4,308.45 = 1,724.66/x
  3. Step 3: Cross multiply
    3,121.94x = 4,308.45 × 1,724.66
  4. Step 4: Simplify right side
    3,121.94x = 7,430,611.38
  5. Step 5: Solve for x
    x = 7,430,611.38/3,121.94
  6. Step 6: Final answer
    x = 2,380.13

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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.