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Finding the Fourth Proportional to 419,313.75, 631,771.41 and 379,383.92

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Solution

The fourth proportional to 419,313.75, 631,771.41 and 379,383.92 is: 571,609.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,313.75 : 631,771.41 = 379,383.92 : x
  2. Step 2: Convert to fraction form
    419,313.75/631,771.41 = 379,383.92/x
  3. Step 3: Cross multiply
    419,313.75x = 631,771.41 × 379,383.92
  4. Step 4: Simplify right side
    419,313.75x = 239,683,914,702.70
  5. Step 5: Solve for x
    x = 239,683,914,702.70/419,313.75
  6. Step 6: Final answer
    x = 571,609.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.