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Finding the Fourth Proportional to 665,771.32, 998,908.58 and 399,717.30

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Solution

The fourth proportional to 665,771.32, 998,908.58 and 399,717.30 is: 599,727.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,771.32 : 998,908.58 = 399,717.30 : x
  2. Step 2: Convert to fraction form
    665,771.32/998,908.58 = 399,717.30/x
  3. Step 3: Cross multiply
    665,771.32x = 998,908.58 × 399,717.30
  4. Step 4: Simplify right side
    665,771.32x = 399,281,040,544.43
  5. Step 5: Solve for x
    x = 399,281,040,544.43/665,771.32
  6. Step 6: Final answer
    x = 599,727.01

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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.