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Finding the Fourth Proportional to 393,680.00, 543,295.61 and 221,609.07

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Solution

The fourth proportional to 393,680.00, 543,295.61 and 221,609.07 is: 305,830.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,680.00 : 543,295.61 = 221,609.07 : x
  2. Step 2: Convert to fraction form
    393,680.00/543,295.61 = 221,609.07/x
  3. Step 3: Cross multiply
    393,680.00x = 543,295.61 × 221,609.07
  4. Step 4: Simplify right side
    393,680.00x = 120,399,233,759.14
  5. Step 5: Solve for x
    x = 120,399,233,759.14/393,680.00
  6. Step 6: Final answer
    x = 305,830.21

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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.