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Finding the Fourth Proportional to 236.72, 326.74 and 158.18

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Solution

The fourth proportional to 236.72, 326.74 and 158.18 is: 218.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.72 : 326.74 = 158.18 : x
  2. Step 2: Convert to fraction form
    236.72/326.74 = 158.18/x
  3. Step 3: Cross multiply
    236.72x = 326.74 × 158.18
  4. Step 4: Simplify right side
    236.72x = 51,681.70
  5. Step 5: Solve for x
    x = 51,681.70/236.72
  6. Step 6: Final answer
    x = 218.32

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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.