Home / 288,721.12-398,435.60-161,396.56

Finding the Fourth Proportional to 288,721.12, 398,435.60 and 161,396.56

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Solution

The fourth proportional to 288,721.12, 398,435.60 and 161,396.56 is: 222,727.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,721.12 : 398,435.60 = 161,396.56 : x
  2. Step 2: Convert to fraction form
    288,721.12/398,435.60 = 161,396.56/x
  3. Step 3: Cross multiply
    288,721.12x = 398,435.60 × 161,396.56
  4. Step 4: Simplify right side
    288,721.12x = 64,306,135,221.54
  5. Step 5: Solve for x
    x = 64,306,135,221.54/288,721.12
  6. Step 6: Final answer
    x = 222,727.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.