Home / 809,261.80-1,213,892.70-276,800.20

Finding the Fourth Proportional to 809,261.80, 1,213,892.70 and 276,800.20

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Solution

The fourth proportional to 809,261.80, 1,213,892.70 and 276,800.20 is: 415,200.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,261.80 : 1,213,892.70 = 276,800.20 : x
  2. Step 2: Convert to fraction form
    809,261.80/1,213,892.70 = 276,800.20/x
  3. Step 3: Cross multiply
    809,261.80x = 1,213,892.70 × 276,800.20
  4. Step 4: Simplify right side
    809,261.80x = 336,005,742,138.54
  5. Step 5: Solve for x
    x = 336,005,742,138.54/809,261.80
  6. Step 6: Final answer
    x = 415,200.30

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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.