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Finding the Fourth Proportional to 236.64, 326.34 and 153.66

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Solution

The fourth proportional to 236.64, 326.34 and 153.66 is: 211.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.64 : 326.34 = 153.66 : x
  2. Step 2: Convert to fraction form
    236.64/326.34 = 153.66/x
  3. Step 3: Cross multiply
    236.64x = 326.34 × 153.66
  4. Step 4: Simplify right side
    236.64x = 50,145.40
  5. Step 5: Solve for x
    x = 50,145.40/236.64
  6. Step 6: Final answer
    x = 211.91

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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.