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Finding the Fourth Proportional to 521,657.20, 782,485.80 and 205,951.60

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Solution

The fourth proportional to 521,657.20, 782,485.80 and 205,951.60 is: 308,927.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,657.20 : 782,485.80 = 205,951.60 : x
  2. Step 2: Convert to fraction form
    521,657.20/782,485.80 = 205,951.60/x
  3. Step 3: Cross multiply
    521,657.20x = 782,485.80 × 205,951.60
  4. Step 4: Simplify right side
    521,657.20x = 161,154,202,487.28
  5. Step 5: Solve for x
    x = 161,154,202,487.28/521,657.20
  6. Step 6: Final answer
    x = 308,927.40

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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.