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Finding the Fourth Proportional to 685,022.14, 945,520.71 and 398,597.74

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Solution

The fourth proportional to 685,022.14, 945,520.71 and 398,597.74 is: 550,175.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,022.14 : 945,520.71 = 398,597.74 : x
  2. Step 2: Convert to fraction form
    685,022.14/945,520.71 = 398,597.74/x
  3. Step 3: Cross multiply
    685,022.14x = 945,520.71 × 398,597.74
  4. Step 4: Simplify right side
    685,022.14x = 376,882,418,129.20
  5. Step 5: Solve for x
    x = 376,882,418,129.20/685,022.14
  6. Step 6: Final answer
    x = 550,175.53

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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.