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Finding the Fourth Proportional to 661,057.67, 991,586.83 and 436,365.59

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Solution

The fourth proportional to 661,057.67, 991,586.83 and 436,365.59 is: 654,548.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,057.67 : 991,586.83 = 436,365.59 : x
  2. Step 2: Convert to fraction form
    661,057.67/991,586.83 = 436,365.59/x
  3. Step 3: Cross multiply
    661,057.67x = 991,586.83 × 436,365.59
  4. Step 4: Simplify right side
    661,057.67x = 432,694,367,151.25
  5. Step 5: Solve for x
    x = 432,694,367,151.25/661,057.67
  6. Step 6: Final answer
    x = 654,548.60

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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.