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Finding the Fourth Proportional to 641,657.80, 962,486.70 and 430,150.60

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Solution

The fourth proportional to 641,657.80, 962,486.70 and 430,150.60 is: 645,225.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,657.80 : 962,486.70 = 430,150.60 : x
  2. Step 2: Convert to fraction form
    641,657.80/962,486.70 = 430,150.60/x
  3. Step 3: Cross multiply
    641,657.80x = 962,486.70 × 430,150.60
  4. Step 4: Simplify right side
    641,657.80x = 414,014,231,497.02
  5. Step 5: Solve for x
    x = 414,014,231,497.02/641,657.80
  6. Step 6: Final answer
    x = 645,225.90

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Similar ratio
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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.