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Finding the Fourth Proportional to 686,768.50, 947,798.97 and 385,020.82

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Solution

The fourth proportional to 686,768.50, 947,798.97 and 385,020.82 is: 531,361.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,768.50 : 947,798.97 = 385,020.82 : x
  2. Step 2: Convert to fraction form
    686,768.50/947,798.97 = 385,020.82/x
  3. Step 3: Cross multiply
    686,768.50x = 947,798.97 × 385,020.82
  4. Step 4: Simplify right side
    686,768.50x = 364,922,336,624.56
  5. Step 5: Solve for x
    x = 364,922,336,624.56/686,768.50
  6. Step 6: Final answer
    x = 531,361.49

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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.