Home / 3,121.94-4,308.31-1,724.69

Finding the Fourth Proportional to 3,121.94, 4,308.31 and 1,724.69

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Solution

The fourth proportional to 3,121.94, 4,308.31 and 1,724.69 is: 2,380.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.94 : 4,308.31 = 1,724.69 : x
  2. Step 2: Convert to fraction form
    3,121.94/4,308.31 = 1,724.69/x
  3. Step 3: Cross multiply
    3,121.94x = 4,308.31 × 1,724.69
  4. Step 4: Simplify right side
    3,121.94x = 7,430,484.09
  5. Step 5: Solve for x
    x = 7,430,484.09/3,121.94
  6. Step 6: Final answer
    x = 2,380.09

Related Problems

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Half scale
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Double scale
Find fourth proportional to 3,122.94, 4,309.69 and 1,725.69
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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.