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Finding the Fourth Proportional to 419,591.60, 629,388 and 320,315.46

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Solution

The fourth proportional to 419,591.60, 629,388 and 320,315.46 is: 480,473.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,591.60 : 629,388 = 320,315.46 : x
  2. Step 2: Convert to fraction form
    419,591.60/629,388 = 320,315.46/x
  3. Step 3: Cross multiply
    419,591.60x = 629,388 × 320,315.46
  4. Step 4: Simplify right side
    419,591.60x = 201,602,706,738.48
  5. Step 5: Solve for x
    x = 201,602,706,738.48/419,591.60
  6. Step 6: Final answer
    x = 480,473.65

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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.