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Finding the Fourth Proportional to 235.23, 352.39 and 143.65

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Solution

The fourth proportional to 235.23, 352.39 and 143.65 is: 215.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.23 : 352.39 = 143.65 : x
  2. Step 2: Convert to fraction form
    235.23/352.39 = 143.65/x
  3. Step 3: Cross multiply
    235.23x = 352.39 × 143.65
  4. Step 4: Simplify right side
    235.23x = 50,620.82
  5. Step 5: Solve for x
    x = 50,620.82/235.23
  6. Step 6: Final answer
    x = 215.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.