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Finding the Fourth Proportional to 419,416.38, 628,599.29 and 330,318

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Solution

The fourth proportional to 419,416.38, 628,599.29 and 330,318 is: 495,063.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,416.38 : 628,599.29 = 330,318 : x
  2. Step 2: Convert to fraction form
    419,416.38/628,599.29 = 330,318/x
  3. Step 3: Cross multiply
    419,416.38x = 628,599.29 × 330,318
  4. Step 4: Simplify right side
    419,416.38x = 207,637,658,622.63
  5. Step 5: Solve for x
    x = 207,637,658,622.63/419,416.38
  6. Step 6: Final answer
    x = 495,063.30

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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.