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Finding the Fourth Proportional to 553,780.80, 764,186.40 and 327,499.20

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Solution

The fourth proportional to 553,780.80, 764,186.40 and 327,499.20 is: 451,930.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,780.80 : 764,186.40 = 327,499.20 : x
  2. Step 2: Convert to fraction form
    553,780.80/764,186.40 = 327,499.20/x
  3. Step 3: Cross multiply
    553,780.80x = 764,186.40 × 327,499.20
  4. Step 4: Simplify right side
    553,780.80x = 250,270,434,650.88
  5. Step 5: Solve for x
    x = 250,270,434,650.88/553,780.80
  6. Step 6: Final answer
    x = 451,930.50

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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.