Home / 3,085.25-4,257.74-1,688.09

Finding the Fourth Proportional to 3,085.25, 4,257.74 and 1,688.09

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Solution

The fourth proportional to 3,085.25, 4,257.74 and 1,688.09 is: 2,329.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,085.25 : 4,257.74 = 1,688.09 : x
  2. Step 2: Convert to fraction form
    3,085.25/4,257.74 = 1,688.09/x
  3. Step 3: Cross multiply
    3,085.25x = 4,257.74 × 1,688.09
  4. Step 4: Simplify right side
    3,085.25x = 7,187,439.88
  5. Step 5: Solve for x
    x = 7,187,439.88/3,085.25
  6. Step 6: Final answer
    x = 2,329.61

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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.