Home / 872,942.80-1,309,414.20-311,995.60

Finding the Fourth Proportional to 872,942.80, 1,309,414.20 and 311,995.60

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Solution

The fourth proportional to 872,942.80, 1,309,414.20 and 311,995.60 is: 467,993.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,942.80 : 1,309,414.20 = 311,995.60 : x
  2. Step 2: Convert to fraction form
    872,942.80/1,309,414.20 = 311,995.60/x
  3. Step 3: Cross multiply
    872,942.80x = 1,309,414.20 × 311,995.60
  4. Step 4: Simplify right side
    872,942.80x = 408,531,468,977.52
  5. Step 5: Solve for x
    x = 408,531,468,977.52/872,942.80
  6. Step 6: Final answer
    x = 467,993.40

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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.