Home / 685,427.96-1,028,180.21-212,076.41

Finding the Fourth Proportional to 685,427.96, 1,028,180.21 and 212,076.41

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Solution

The fourth proportional to 685,427.96, 1,028,180.21 and 212,076.41 is: 318,126.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,427.96 : 1,028,180.21 = 212,076.41 : x
  2. Step 2: Convert to fraction form
    685,427.96/1,028,180.21 = 212,076.41/x
  3. Step 3: Cross multiply
    685,427.96x = 1,028,180.21 × 212,076.41
  4. Step 4: Simplify right side
    685,427.96x = 218,052,767,769.85
  5. Step 5: Solve for x
    x = 218,052,767,769.85/685,427.96
  6. Step 6: Final answer
    x = 318,126.46

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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.