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Finding the Fourth Proportional to 638,136.60, 957,204.90 and 401,940.60

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Solution

The fourth proportional to 638,136.60, 957,204.90 and 401,940.60 is: 602,910.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,136.60 : 957,204.90 = 401,940.60 : x
  2. Step 2: Convert to fraction form
    638,136.60/957,204.90 = 401,940.60/x
  3. Step 3: Cross multiply
    638,136.60x = 957,204.90 × 401,940.60
  4. Step 4: Simplify right side
    638,136.60x = 384,739,511,828.94
  5. Step 5: Solve for x
    x = 384,739,511,828.94/638,136.60
  6. Step 6: Final answer
    x = 602,910.90

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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.