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Finding the Fourth Proportional to 666,288.64, 999,578.88 and 192,993.28

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Solution

The fourth proportional to 666,288.64, 999,578.88 and 192,993.28 is: 289,532.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,288.64 : 999,578.88 = 192,993.28 : x
  2. Step 2: Convert to fraction form
    666,288.64/999,578.88 = 192,993.28/x
  3. Step 3: Cross multiply
    666,288.64x = 999,578.88 × 192,993.28
  4. Step 4: Simplify right side
    666,288.64x = 192,912,006,669.93
  5. Step 5: Solve for x
    x = 192,912,006,669.93/666,288.64
  6. Step 6: Final answer
    x = 289,532.19

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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.