Home / 3,122.75-4,309.40-1,725.71

Finding the Fourth Proportional to 3,122.75, 4,309.40 and 1,725.71

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Solution

The fourth proportional to 3,122.75, 4,309.40 and 1,725.71 is: 2,381.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.75 : 4,309.40 = 1,725.71 : x
  2. Step 2: Convert to fraction form
    3,122.75/4,309.40 = 1,725.71/x
  3. Step 3: Cross multiply
    3,122.75x = 4,309.40 × 1,725.71
  4. Step 4: Simplify right side
    3,122.75x = 7,436,766.05
  5. Step 5: Solve for x
    x = 7,436,766.05/3,122.75
  6. Step 6: Final answer
    x = 2,381.48

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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.