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Finding the Fourth Proportional to 206,901.36, 309,921.47 and 199,763.64

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Solution

The fourth proportional to 206,901.36, 309,921.47 and 199,763.64 is: 299,229.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,901.36 : 309,921.47 = 199,763.64 : x
  2. Step 2: Convert to fraction form
    206,901.36/309,921.47 = 199,763.64/x
  3. Step 3: Cross multiply
    206,901.36x = 309,921.47 × 199,763.64
  4. Step 4: Simplify right side
    206,901.36x = 61,911,040,961.35
  5. Step 5: Solve for x
    x = 61,911,040,961.35/206,901.36
  6. Step 6: Final answer
    x = 299,229.74

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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.