Home / 809,411.80-1,214,117.70-388,586.20

Finding the Fourth Proportional to 809,411.80, 1,214,117.70 and 388,586.20

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Solution

The fourth proportional to 809,411.80, 1,214,117.70 and 388,586.20 is: 582,879.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,411.80 : 1,214,117.70 = 388,586.20 : x
  2. Step 2: Convert to fraction form
    809,411.80/1,214,117.70 = 388,586.20/x
  3. Step 3: Cross multiply
    809,411.80x = 1,214,117.70 × 388,586.20
  4. Step 4: Simplify right side
    809,411.80x = 471,789,383,395.74
  5. Step 5: Solve for x
    x = 471,789,383,395.74/809,411.80
  6. Step 6: Final answer
    x = 582,879.30

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Half scale
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Double scale
Find fourth proportional to 809,412.80, 1,214,119.20 and 388,587.20
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.