Home / 685,894.41-946,996.20-428,163.75

Finding the Fourth Proportional to 685,894.41, 946,996.20 and 428,163.75

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Solution

The fourth proportional to 685,894.41, 946,996.20 and 428,163.75 is: 591,154.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,894.41 : 946,996.20 = 428,163.75 : x
  2. Step 2: Convert to fraction form
    685,894.41/946,996.20 = 428,163.75/x
  3. Step 3: Cross multiply
    685,894.41x = 946,996.20 × 428,163.75
  4. Step 4: Simplify right side
    685,894.41x = 405,469,444,227.75
  5. Step 5: Solve for x
    x = 405,469,444,227.75/685,894.41
  6. Step 6: Final answer
    x = 591,154.32

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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.