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Finding the Fourth Proportional to 236.66, 356.48 and 211.28

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Solution

The fourth proportional to 236.66, 356.48 and 211.28 is: 318.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.66 : 356.48 = 211.28 : x
  2. Step 2: Convert to fraction form
    236.66/356.48 = 211.28/x
  3. Step 3: Cross multiply
    236.66x = 356.48 × 211.28
  4. Step 4: Simplify right side
    236.66x = 75,317.09
  5. Step 5: Solve for x
    x = 75,317.09/236.66
  6. Step 6: Final answer
    x = 318.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.