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Finding the Fourth Proportional to 665,709.80, 998,564.70 and 192,410.60

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Solution

The fourth proportional to 665,709.80, 998,564.70 and 192,410.60 is: 288,615.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,709.80 : 998,564.70 = 192,410.60 : x
  2. Step 2: Convert to fraction form
    665,709.80/998,564.70 = 192,410.60/x
  3. Step 3: Cross multiply
    665,709.80x = 998,564.70 × 192,410.60
  4. Step 4: Simplify right side
    665,709.80x = 192,134,433,065.82
  5. Step 5: Solve for x
    x = 192,134,433,065.82/665,709.80
  6. Step 6: Final answer
    x = 288,615.90

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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.