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Finding the Fourth Proportional to 393,654,828.80, 590,482,243.20 and 189,133,587.20

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Solution

The fourth proportional to 393,654,828.80, 590,482,243.20 and 189,133,587.20 is: 283,700,380.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,654,828.80 : 590,482,243.20 = 189,133,587.20 : x
  2. Step 2: Convert to fraction form
    393,654,828.80/590,482,243.20 = 189,133,587.20/x
  3. Step 3: Cross multiply
    393,654,828.80x = 590,482,243.20 × 189,133,587.20
  4. Step 4: Simplify right side
    393,654,828.80x = 111,680,024,834,318,816
  5. Step 5: Solve for x
    x = 111,680,024,834,318,816/393,654,828.80
  6. Step 6: Final answer
    x = 283,700,380.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.