Home / 311,015.21-428,601.71-225,997.61

Finding the Fourth Proportional to 311,015.21, 428,601.71 and 225,997.61

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Solution

The fourth proportional to 311,015.21, 428,601.71 and 225,997.61 is: 311,441.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,015.21 : 428,601.71 = 225,997.61 : x
  2. Step 2: Convert to fraction form
    311,015.21/428,601.71 = 225,997.61/x
  3. Step 3: Cross multiply
    311,015.21x = 428,601.71 × 225,997.61
  4. Step 4: Simplify right side
    311,015.21x = 96,862,960,523.90
  5. Step 5: Solve for x
    x = 96,862,960,523.90/311,015.21
  6. Step 6: Final answer
    x = 311,441.24

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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.