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Finding the Fourth Proportional to 431,998.40, 647,914.08 and 132,406.40

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Solution

The fourth proportional to 431,998.40, 647,914.08 and 132,406.40 is: 198,584.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,998.40 : 647,914.08 = 132,406.40 : x
  2. Step 2: Convert to fraction form
    431,998.40/647,914.08 = 132,406.40/x
  3. Step 3: Cross multiply
    431,998.40x = 647,914.08 × 132,406.40
  4. Step 4: Simplify right side
    431,998.40x = 85,787,970,842.11
  5. Step 5: Solve for x
    x = 85,787,970,842.11/431,998.40
  6. Step 6: Final answer
    x = 198,584.00

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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.