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Finding the Fourth Proportional to 665,889.36, 998,843.25 and 216,612.57

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Solution

The fourth proportional to 665,889.36, 998,843.25 and 216,612.57 is: 324,921.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,889.36 : 998,843.25 = 216,612.57 : x
  2. Step 2: Convert to fraction form
    665,889.36/998,843.25 = 216,612.57/x
  3. Step 3: Cross multiply
    665,889.36x = 998,843.25 × 216,612.57
  4. Step 4: Simplify right side
    665,889.36x = 216,362,003,409.65
  5. Step 5: Solve for x
    x = 216,362,003,409.65/665,889.36
  6. Step 6: Final answer
    x = 324,921.85

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1.5x scale

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.