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Finding the Fourth Proportional to 626,640.60, 939,960.90 and 205,930.20

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Solution

The fourth proportional to 626,640.60, 939,960.90 and 205,930.20 is: 308,895.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,640.60 : 939,960.90 = 205,930.20 : x
  2. Step 2: Convert to fraction form
    626,640.60/939,960.90 = 205,930.20/x
  3. Step 3: Cross multiply
    626,640.60x = 939,960.90 × 205,930.20
  4. Step 4: Simplify right side
    626,640.60x = 193,566,336,129.18
  5. Step 5: Solve for x
    x = 193,566,336,129.18/626,640.60
  6. Step 6: Final answer
    x = 308,895.30

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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.