Home / 311,016.21-428,603.09-225,998.61

Finding the Fourth Proportional to 311,016.21, 428,603.09 and 225,998.61

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Solution

The fourth proportional to 311,016.21, 428,603.09 and 225,998.61 is: 311,442.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,016.21 : 428,603.09 = 225,998.61 : x
  2. Step 2: Convert to fraction form
    311,016.21/428,603.09 = 225,998.61/x
  3. Step 3: Cross multiply
    311,016.21x = 428,603.09 × 225,998.61
  4. Step 4: Simplify right side
    311,016.21x = 96,863,702,581.70
  5. Step 5: Solve for x
    x = 96,863,702,581.70/311,016.21
  6. Step 6: Final answer
    x = 311,442.62

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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.