Home / 809,764.56-1,215,383.76-431,003.16

Finding the Fourth Proportional to 809,764.56, 1,215,383.76 and 431,003.16

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Solution

The fourth proportional to 809,764.56, 1,215,383.76 and 431,003.16 is: 646,896.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,764.56 : 1,215,383.76 = 431,003.16 : x
  2. Step 2: Convert to fraction form
    809,764.56/1,215,383.76 = 431,003.16/x
  3. Step 3: Cross multiply
    809,764.56x = 1,215,383.76 × 431,003.16
  4. Step 4: Simplify right side
    809,764.56x = 523,834,241,172.68
  5. Step 5: Solve for x
    x = 523,834,241,172.68/809,764.56
  6. Step 6: Final answer
    x = 646,896.97

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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.