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Finding the Fourth Proportional to 979,620.80, 1,469,344.80 and 269,585.60

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Solution

The fourth proportional to 979,620.80, 1,469,344.80 and 269,585.60 is: 404,354.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,620.80 : 1,469,344.80 = 269,585.60 : x
  2. Step 2: Convert to fraction form
    979,620.80/1,469,344.80 = 269,585.60/x
  3. Step 3: Cross multiply
    979,620.80x = 1,469,344.80 × 269,585.60
  4. Step 4: Simplify right side
    979,620.80x = 396,114,199,514.88
  5. Step 5: Solve for x
    x = 396,114,199,514.88/979,620.80
  6. Step 6: Final answer
    x = 404,354.62

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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.