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Finding the Fourth Proportional to 605,720.40, 908,580.60 and 419,096.40

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Solution

The fourth proportional to 605,720.40, 908,580.60 and 419,096.40 is: 628,644.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,720.40 : 908,580.60 = 419,096.40 : x
  2. Step 2: Convert to fraction form
    605,720.40/908,580.60 = 419,096.40/x
  3. Step 3: Cross multiply
    605,720.40x = 908,580.60 × 419,096.40
  4. Step 4: Simplify right side
    605,720.40x = 380,782,858,569.84
  5. Step 5: Solve for x
    x = 380,782,858,569.84/605,720.40
  6. Step 6: Final answer
    x = 628,644.60

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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.