Home / 809,340.30-1,214,010.45-388,514.70

Finding the Fourth Proportional to 809,340.30, 1,214,010.45 and 388,514.70

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Solution

The fourth proportional to 809,340.30, 1,214,010.45 and 388,514.70 is: 582,772.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,340.30 : 1,214,010.45 = 388,514.70 : x
  2. Step 2: Convert to fraction form
    809,340.30/1,214,010.45 = 388,514.70/x
  3. Step 3: Cross multiply
    809,340.30x = 1,214,010.45 × 388,514.70
  4. Step 4: Simplify right side
    809,340.30x = 471,660,905,778.62
  5. Step 5: Solve for x
    x = 471,660,905,778.62/809,340.30
  6. Step 6: Final answer
    x = 582,772.05

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Double scale
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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.