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Finding the Fourth Proportional to 641,658.80, 962,488.20 and 430,151.60

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Solution

The fourth proportional to 641,658.80, 962,488.20 and 430,151.60 is: 645,227.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,658.80 : 962,488.20 = 430,151.60 : x
  2. Step 2: Convert to fraction form
    641,658.80/962,488.20 = 430,151.60/x
  3. Step 3: Cross multiply
    641,658.80x = 962,488.20 × 430,151.60
  4. Step 4: Simplify right side
    641,658.80x = 414,015,839,211.12
  5. Step 5: Solve for x
    x = 414,015,839,211.12/641,658.80
  6. Step 6: Final answer
    x = 645,227.40

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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.