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Finding the Fourth Proportional to 664,716.60, 997,220.70 and 327,918.60

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Solution

The fourth proportional to 664,716.60, 997,220.70 and 327,918.60 is: 491,949.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,716.60 : 997,220.70 = 327,918.60 : x
  2. Step 2: Convert to fraction form
    664,716.60/997,220.70 = 327,918.60/x
  3. Step 3: Cross multiply
    664,716.60x = 997,220.70 × 327,918.60
  4. Step 4: Simplify right side
    664,716.60x = 327,007,215,835.02
  5. Step 5: Solve for x
    x = 327,007,215,835.02/664,716.60
  6. Step 6: Final answer
    x = 491,949.83

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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.