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Finding the Fourth Proportional to 511,846.80, 768,115.80 and 287,206.80

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Solution

The fourth proportional to 511,846.80, 768,115.80 and 287,206.80 is: 431,004.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,846.80 : 768,115.80 = 287,206.80 : x
  2. Step 2: Convert to fraction form
    511,846.80/768,115.80 = 287,206.80/x
  3. Step 3: Cross multiply
    511,846.80x = 768,115.80 × 287,206.80
  4. Step 4: Simplify right side
    511,846.80x = 220,608,080,947.44
  5. Step 5: Solve for x
    x = 220,608,080,947.44/511,846.80
  6. Step 6: Final answer
    x = 431,004.12

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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.