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Finding the Fourth Proportional to 312,709.92, 431,540.07 and 169,469.97

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Solution

The fourth proportional to 312,709.92, 431,540.07 and 169,469.97 is: 233,868.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,709.92 : 431,540.07 = 169,469.97 : x
  2. Step 2: Convert to fraction form
    312,709.92/431,540.07 = 169,469.97/x
  3. Step 3: Cross multiply
    312,709.92x = 431,540.07 × 169,469.97
  4. Step 4: Simplify right side
    312,709.92x = 73,133,082,716.70
  5. Step 5: Solve for x
    x = 73,133,082,716.70/312,709.92
  6. Step 6: Final answer
    x = 233,868.76

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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.