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Finding the Fourth Proportional to 605,611.20, 908,416.80 and 289,905.60

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Solution

The fourth proportional to 605,611.20, 908,416.80 and 289,905.60 is: 434,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,611.20 : 908,416.80 = 289,905.60 : x
  2. Step 2: Convert to fraction form
    605,611.20/908,416.80 = 289,905.60/x
  3. Step 3: Cross multiply
    605,611.20x = 908,416.80 × 289,905.60
  4. Step 4: Simplify right side
    605,611.20x = 263,355,117,454.08
  5. Step 5: Solve for x
    x = 263,355,117,454.08/605,611.20
  6. Step 6: Final answer
    x = 434,858.40

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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.