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Finding the Fourth Proportional to 519,629.20, 778,860.60 and 220,058.80

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Solution

The fourth proportional to 519,629.20, 778,860.60 and 220,058.80 is: 329,841.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,629.20 : 778,860.60 = 220,058.80 : x
  2. Step 2: Convert to fraction form
    519,629.20/778,860.60 = 220,058.80/x
  3. Step 3: Cross multiply
    519,629.20x = 778,860.60 × 220,058.80
  4. Step 4: Simplify right side
    519,629.20x = 171,395,129,003.28
  5. Step 5: Solve for x
    x = 171,395,129,003.28/519,629.20
  6. Step 6: Final answer
    x = 329,841.22

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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.