Home / 809,455.40-1,214,183.10-411,324.20

Finding the Fourth Proportional to 809,455.40, 1,214,183.10 and 411,324.20

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Solution

The fourth proportional to 809,455.40, 1,214,183.10 and 411,324.20 is: 616,986.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,455.40 : 1,214,183.10 = 411,324.20 : x
  2. Step 2: Convert to fraction form
    809,455.40/1,214,183.10 = 411,324.20/x
  3. Step 3: Cross multiply
    809,455.40x = 1,214,183.10 × 411,324.20
  4. Step 4: Simplify right side
    809,455.40x = 499,422,892,261.02
  5. Step 5: Solve for x
    x = 499,422,892,261.02/809,455.40
  6. Step 6: Final answer
    x = 616,986.30

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Half scale
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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.