Home / 2,138.08-3,205.74-839.68

Finding the Fourth Proportional to 2,138.08, 3,205.74 and 839.68

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Solution

The fourth proportional to 2,138.08, 3,205.74 and 839.68 is: 1,258.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.08 : 3,205.74 = 839.68 : x
  2. Step 2: Convert to fraction form
    2,138.08/3,205.74 = 839.68/x
  3. Step 3: Cross multiply
    2,138.08x = 3,205.74 × 839.68
  4. Step 4: Simplify right side
    2,138.08x = 2,691,795.76
  5. Step 5: Solve for x
    x = 2,691,795.76/2,138.08
  6. Step 6: Final answer
    x = 1,258.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.