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Finding the Fourth Proportional to 206,511.60, 309,767.40 and 198,638.40

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Solution

The fourth proportional to 206,511.60, 309,767.40 and 198,638.40 is: 297,957.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,511.60 : 309,767.40 = 198,638.40 : x
  2. Step 2: Convert to fraction form
    206,511.60/309,767.40 = 198,638.40/x
  3. Step 3: Cross multiply
    206,511.60x = 309,767.40 × 198,638.40
  4. Step 4: Simplify right side
    206,511.60x = 61,531,700,708.16
  5. Step 5: Solve for x
    x = 61,531,700,708.16/206,511.60
  6. Step 6: Final answer
    x = 297,957.60

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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.