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Finding the Fourth Proportional to 540,009.20, 809,495.40 and 419,999.60

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Solution

The fourth proportional to 540,009.20, 809,495.40 and 419,999.60 is: 629,596.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,009.20 : 809,495.40 = 419,999.60 : x
  2. Step 2: Convert to fraction form
    540,009.20/809,495.40 = 419,999.60/x
  3. Step 3: Cross multiply
    540,009.20x = 809,495.40 × 419,999.60
  4. Step 4: Simplify right side
    540,009.20x = 339,987,744,201.84
  5. Step 5: Solve for x
    x = 339,987,744,201.84/540,009.20
  6. Step 6: Final answer
    x = 629,596.21

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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.