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Finding the Fourth Proportional to 539,879.80, 809,819.70 and 382,286.20

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Solution

The fourth proportional to 539,879.80, 809,819.70 and 382,286.20 is: 573,429.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,879.80 : 809,819.70 = 382,286.20 : x
  2. Step 2: Convert to fraction form
    539,879.80/809,819.70 = 382,286.20/x
  3. Step 3: Cross multiply
    539,879.80x = 809,819.70 × 382,286.20
  4. Step 4: Simplify right side
    539,879.80x = 309,582,895,798.14
  5. Step 5: Solve for x
    x = 309,582,895,798.14/539,879.80
  6. Step 6: Final answer
    x = 573,429.30

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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.