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Finding the Fourth Proportional to 539,480.80, 809,221.20 and 371,519.20

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Solution

The fourth proportional to 539,480.80, 809,221.20 and 371,519.20 is: 557,278.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,480.80 : 809,221.20 = 371,519.20 : x
  2. Step 2: Convert to fraction form
    539,480.80/809,221.20 = 371,519.20/x
  3. Step 3: Cross multiply
    539,480.80x = 809,221.20 × 371,519.20
  4. Step 4: Simplify right side
    539,480.80x = 300,641,212,847.04
  5. Step 5: Solve for x
    x = 300,641,212,847.04/539,480.80
  6. Step 6: Final answer
    x = 557,278.80

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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.