Home / 3,085.75-4,258.43-1,688.59

Finding the Fourth Proportional to 3,085.75, 4,258.43 and 1,688.59

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Solution

The fourth proportional to 3,085.75, 4,258.43 and 1,688.59 is: 2,330.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,085.75 : 4,258.43 = 1,688.59 : x
  2. Step 2: Convert to fraction form
    3,085.75/4,258.43 = 1,688.59/x
  3. Step 3: Cross multiply
    3,085.75x = 4,258.43 × 1,688.59
  4. Step 4: Simplify right side
    3,085.75x = 7,190,733.87
  5. Step 5: Solve for x
    x = 7,190,733.87/3,085.75
  6. Step 6: Final answer
    x = 2,330.30

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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.