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Finding the Fourth Proportional to 311,128.98, 429,245.70 and 203,760.24

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Solution

The fourth proportional to 311,128.98, 429,245.70 and 203,760.24 is: 281,115.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,128.98 : 429,245.70 = 203,760.24 : x
  2. Step 2: Convert to fraction form
    311,128.98/429,245.70 = 203,760.24/x
  3. Step 3: Cross multiply
    311,128.98x = 429,245.70 × 203,760.24
  4. Step 4: Simplify right side
    311,128.98x = 87,463,206,850.97
  5. Step 5: Solve for x
    x = 87,463,206,850.97/311,128.98
  6. Step 6: Final answer
    x = 281,115.59

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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.