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Finding the Fourth Proportional to 439,626.80, 659,440.20 and 436,516.40

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Solution

The fourth proportional to 439,626.80, 659,440.20 and 436,516.40 is: 654,774.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,626.80 : 659,440.20 = 436,516.40 : x
  2. Step 2: Convert to fraction form
    439,626.80/659,440.20 = 436,516.40/x
  3. Step 3: Cross multiply
    439,626.80x = 659,440.20 × 436,516.40
  4. Step 4: Simplify right side
    439,626.80x = 287,856,462,119.28
  5. Step 5: Solve for x
    x = 287,856,462,119.28/439,626.80
  6. Step 6: Final answer
    x = 654,774.60

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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.