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Finding the Fourth Proportional to 393,698.80, 543,304.20 and 214,850.80

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Solution

The fourth proportional to 393,698.80, 543,304.20 and 214,850.80 is: 296,494.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,698.80 : 543,304.20 = 214,850.80 : x
  2. Step 2: Convert to fraction form
    393,698.80/543,304.20 = 214,850.80/x
  3. Step 3: Cross multiply
    393,698.80x = 543,304.20 × 214,850.80
  4. Step 4: Simplify right side
    393,698.80x = 116,729,342,013.36
  5. Step 5: Solve for x
    x = 116,729,342,013.36/393,698.80
  6. Step 6: Final answer
    x = 296,494.03

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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.