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Finding the Fourth Proportional to 238.65, 329.48 and 145.43

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Solution

The fourth proportional to 238.65, 329.48 and 145.43 is: 200.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.65 : 329.48 = 145.43 : x
  2. Step 2: Convert to fraction form
    238.65/329.48 = 145.43/x
  3. Step 3: Cross multiply
    238.65x = 329.48 × 145.43
  4. Step 4: Simplify right side
    238.65x = 47,913.90
  5. Step 5: Solve for x
    x = 47,913.90/238.65
  6. Step 6: Final answer
    x = 200.77

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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.