Home / 2,215.41-3,321.32-828.55

Finding the Fourth Proportional to 2,215.41, 3,321.32 and 828.55

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Solution

The fourth proportional to 2,215.41, 3,321.32 and 828.55 is: 1,242.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.41 : 3,321.32 = 828.55 : x
  2. Step 2: Convert to fraction form
    2,215.41/3,321.32 = 828.55/x
  3. Step 3: Cross multiply
    2,215.41x = 3,321.32 × 828.55
  4. Step 4: Simplify right side
    2,215.41x = 2,751,865.67
  5. Step 5: Solve for x
    x = 2,751,865.67/2,215.41
  6. Step 6: Final answer
    x = 1,242.15

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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.