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Finding the Fourth Proportional to 647,243.80, 970,865.70 and 435,736.60

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Solution

The fourth proportional to 647,243.80, 970,865.70 and 435,736.60 is: 653,604.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,243.80 : 970,865.70 = 435,736.60 : x
  2. Step 2: Convert to fraction form
    647,243.80/970,865.70 = 435,736.60/x
  3. Step 3: Cross multiply
    647,243.80x = 970,865.70 × 435,736.60
  4. Step 4: Simplify right side
    647,243.80x = 423,041,719,174.62
  5. Step 5: Solve for x
    x = 423,041,719,174.62/647,243.80
  6. Step 6: Final answer
    x = 653,604.90

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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.