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Finding the Fourth Proportional to 393,654.20, 543,241.50 and 223,878.20

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Solution

The fourth proportional to 393,654.20, 543,241.50 and 223,878.20 is: 308,951.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,654.20 : 543,241.50 = 223,878.20 : x
  2. Step 2: Convert to fraction form
    393,654.20/543,241.50 = 223,878.20/x
  3. Step 3: Cross multiply
    393,654.20x = 543,241.50 × 223,878.20
  4. Step 4: Simplify right side
    393,654.20x = 121,619,929,185.30
  5. Step 5: Solve for x
    x = 121,619,929,185.30/393,654.20
  6. Step 6: Final answer
    x = 308,951.18

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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.