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Finding the Fourth Proportional to 419,383.60, 628,550.79 and 330,285.22

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Solution

The fourth proportional to 419,383.60, 628,550.79 and 330,285.22 is: 495,014.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,383.60 : 628,550.79 = 330,285.22 : x
  2. Step 2: Convert to fraction form
    419,383.60/628,550.79 = 330,285.22/x
  3. Step 3: Cross multiply
    419,383.60x = 628,550.79 × 330,285.22
  4. Step 4: Simplify right side
    419,383.60x = 207,601,035,956.32
  5. Step 5: Solve for x
    x = 207,601,035,956.32/419,383.60
  6. Step 6: Final answer
    x = 495,014.67

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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.