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Finding the Fourth Proportional to 510,112.80, 765,169.20 and 419,911.20

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Solution

The fourth proportional to 510,112.80, 765,169.20 and 419,911.20 is: 629,866.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    510,112.80 : 765,169.20 = 419,911.20 : x
  2. Step 2: Convert to fraction form
    510,112.80/765,169.20 = 419,911.20/x
  3. Step 3: Cross multiply
    510,112.80x = 765,169.20 × 419,911.20
  4. Step 4: Simplify right side
    510,112.80x = 321,303,116,975.04
  5. Step 5: Solve for x
    x = 321,303,116,975.04/510,112.80
  6. Step 6: Final answer
    x = 629,866.80

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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.