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Finding the Fourth Proportional to 235.65, 325.28 and 142.43

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Solution

The fourth proportional to 235.65, 325.28 and 142.43 is: 196.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.65 : 325.28 = 142.43 : x
  2. Step 2: Convert to fraction form
    235.65/325.28 = 142.43/x
  3. Step 3: Cross multiply
    235.65x = 325.28 × 142.43
  4. Step 4: Simplify right side
    235.65x = 46,329.63
  5. Step 5: Solve for x
    x = 46,329.63/235.65
  6. Step 6: Final answer
    x = 196.60

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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.