Home / 809,138.70-1,213,708.05-276,612.30

Finding the Fourth Proportional to 809,138.70, 1,213,708.05 and 276,612.30

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Solution

The fourth proportional to 809,138.70, 1,213,708.05 and 276,612.30 is: 414,918.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,138.70 : 1,213,708.05 = 276,612.30 : x
  2. Step 2: Convert to fraction form
    809,138.70/1,213,708.05 = 276,612.30/x
  3. Step 3: Cross multiply
    809,138.70x = 1,213,708.05 × 276,612.30
  4. Step 4: Simplify right side
    809,138.70x = 335,726,575,239.02
  5. Step 5: Solve for x
    x = 335,726,575,239.02/809,138.70
  6. Step 6: Final answer
    x = 414,918.45

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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.