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Finding the Fourth Proportional to 543,399.60, 815,713.80 and 419,290.80

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Solution

The fourth proportional to 543,399.60, 815,713.80 and 419,290.80 is: 629,410.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,399.60 : 815,713.80 = 419,290.80 : x
  2. Step 2: Convert to fraction form
    543,399.60/815,713.80 = 419,290.80/x
  3. Step 3: Cross multiply
    543,399.60x = 815,713.80 × 419,290.80
  4. Step 4: Simplify right side
    543,399.60x = 342,021,291,773.04
  5. Step 5: Solve for x
    x = 342,021,291,773.04/543,399.60
  6. Step 6: Final answer
    x = 629,410.28

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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.