Home / 685,251.05-945,634.97-379,320.89

Finding the Fourth Proportional to 685,251.05, 945,634.97 and 379,320.89

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Solution

The fourth proportional to 685,251.05, 945,634.97 and 379,320.89 is: 523,456.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,251.05 : 945,634.97 = 379,320.89 : x
  2. Step 2: Convert to fraction form
    685,251.05/945,634.97 = 379,320.89/x
  3. Step 3: Cross multiply
    685,251.05x = 945,634.97 × 379,320.89
  4. Step 4: Simplify right side
    685,251.05x = 358,699,098,435.52
  5. Step 5: Solve for x
    x = 358,699,098,435.52/685,251.05
  6. Step 6: Final answer
    x = 523,456.47

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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.