Home / 856,873.40-1,285,310.10-324,411.80

Finding the Fourth Proportional to 856,873.40, 1,285,310.10 and 324,411.80

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Solution

The fourth proportional to 856,873.40, 1,285,310.10 and 324,411.80 is: 486,617.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,873.40 : 1,285,310.10 = 324,411.80 : x
  2. Step 2: Convert to fraction form
    856,873.40/1,285,310.10 = 324,411.80/x
  3. Step 3: Cross multiply
    856,873.40x = 1,285,310.10 × 324,411.80
  4. Step 4: Simplify right side
    856,873.40x = 416,969,763,099.18
  5. Step 5: Solve for x
    x = 416,969,763,099.18/856,873.40
  6. Step 6: Final answer
    x = 486,617.70

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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.