Home / 263,243.06-394,864.28-85,749.78

Finding the Fourth Proportional to 263,243.06, 394,864.28 and 85,749.78

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Solution

The fourth proportional to 263,243.06, 394,864.28 and 85,749.78 is: 128,624.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,243.06 : 394,864.28 = 85,749.78 : x
  2. Step 2: Convert to fraction form
    263,243.06/394,864.28 = 85,749.78/x
  3. Step 3: Cross multiply
    263,243.06x = 394,864.28 × 85,749.78
  4. Step 4: Simplify right side
    263,243.06x = 33,859,524,711.11
  5. Step 5: Solve for x
    x = 33,859,524,711.11/263,243.06
  6. Step 6: Final answer
    x = 128,624.57

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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.