Home / 2,154.23-3,231.35-855.69

Finding the Fourth Proportional to 2,154.23, 3,231.35 and 855.69

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Solution

The fourth proportional to 2,154.23, 3,231.35 and 855.69 is: 1,283.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.23 : 3,231.35 = 855.69 : x
  2. Step 2: Convert to fraction form
    2,154.23/3,231.35 = 855.69/x
  3. Step 3: Cross multiply
    2,154.23x = 3,231.35 × 855.69
  4. Step 4: Simplify right side
    2,154.23x = 2,765,029.60
  5. Step 5: Solve for x
    x = 2,765,029.60/2,154.23
  6. Step 6: Final answer
    x = 1,283.54

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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.