Home / 2,215.15-3,322.85-828.85

Finding the Fourth Proportional to 2,215.15, 3,322.85 and 828.85

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Solution

The fourth proportional to 2,215.15, 3,322.85 and 828.85 is: 1,243.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.15 : 3,322.85 = 828.85 : x
  2. Step 2: Convert to fraction form
    2,215.15/3,322.85 = 828.85/x
  3. Step 3: Cross multiply
    2,215.15x = 3,322.85 × 828.85
  4. Step 4: Simplify right side
    2,215.15x = 2,754,144.22
  5. Step 5: Solve for x
    x = 2,754,144.22/2,215.15
  6. Step 6: Final answer
    x = 1,243.32

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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.