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Finding the Fourth Proportional to 235.53, 324.79 and 142.29

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Solution

The fourth proportional to 235.53, 324.79 and 142.29 is: 196.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.53 : 324.79 = 142.29 : x
  2. Step 2: Convert to fraction form
    235.53/324.79 = 142.29/x
  3. Step 3: Cross multiply
    235.53x = 324.79 × 142.29
  4. Step 4: Simplify right side
    235.53x = 46,214.37
  5. Step 5: Solve for x
    x = 46,214.37/235.53
  6. Step 6: Final answer
    x = 196.21

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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.