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Finding the Fourth Proportional to 170.40, 236.40 and 163.20

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Solution

The fourth proportional to 170.40, 236.40 and 163.20 is: 226.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.40 : 236.40 = 163.20 : x
  2. Step 2: Convert to fraction form
    170.40/236.40 = 163.20/x
  3. Step 3: Cross multiply
    170.40x = 236.40 × 163.20
  4. Step 4: Simplify right side
    170.40x = 38,580.48
  5. Step 5: Solve for x
    x = 38,580.48/170.40
  6. Step 6: Final answer
    x = 226.41

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.