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Finding the Fourth Proportional to 613,691.80, 920,537.70 and 193,096.60

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Solution

The fourth proportional to 613,691.80, 920,537.70 and 193,096.60 is: 289,644.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,691.80 : 920,537.70 = 193,096.60 : x
  2. Step 2: Convert to fraction form
    613,691.80/920,537.70 = 193,096.60/x
  3. Step 3: Cross multiply
    613,691.80x = 920,537.70 × 193,096.60
  4. Step 4: Simplify right side
    613,691.80x = 177,752,700,041.82
  5. Step 5: Solve for x
    x = 177,752,700,041.82/613,691.80
  6. Step 6: Final answer
    x = 289,644.90

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Double scale
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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.