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Finding the Fourth Proportional to 626,620.60, 939,930.90 and 205,910.20

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Solution

The fourth proportional to 626,620.60, 939,930.90 and 205,910.20 is: 308,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,620.60 : 939,930.90 = 205,910.20 : x
  2. Step 2: Convert to fraction form
    626,620.60/939,930.90 = 205,910.20/x
  3. Step 3: Cross multiply
    626,620.60x = 939,930.90 × 205,910.20
  4. Step 4: Simplify right side
    626,620.60x = 193,541,359,605.18
  5. Step 5: Solve for x
    x = 193,541,359,605.18/626,620.60
  6. Step 6: Final answer
    x = 308,865.30

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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.