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Finding the Fourth Proportional to 539,563.20, 809,344.80 and 259,012.80

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Solution

The fourth proportional to 539,563.20, 809,344.80 and 259,012.80 is: 388,519.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,563.20 : 809,344.80 = 259,012.80 : x
  2. Step 2: Convert to fraction form
    539,563.20/809,344.80 = 259,012.80/x
  3. Step 3: Cross multiply
    539,563.20x = 809,344.80 × 259,012.80
  4. Step 4: Simplify right side
    539,563.20x = 209,630,662,813.44
  5. Step 5: Solve for x
    x = 209,630,662,813.44/539,563.20
  6. Step 6: Final answer
    x = 388,519.20

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Similar ratio
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1.5x scale

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.