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Finding the Fourth Proportional to 664,640.40, 996,960.60 and 243,861.60

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Solution

The fourth proportional to 664,640.40, 996,960.60 and 243,861.60 is: 365,792.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,640.40 : 996,960.60 = 243,861.60 : x
  2. Step 2: Convert to fraction form
    664,640.40/996,960.60 = 243,861.60/x
  3. Step 3: Cross multiply
    664,640.40x = 996,960.60 × 243,861.60
  4. Step 4: Simplify right side
    664,640.40x = 243,120,407,052.96
  5. Step 5: Solve for x
    x = 243,120,407,052.96/664,640.40
  6. Step 6: Final answer
    x = 365,792.40

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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.