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Finding the Fourth Proportional to 238.81, 329.47 and 140.55

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Solution

The fourth proportional to 238.81, 329.47 and 140.55 is: 193.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.81 : 329.47 = 140.55 : x
  2. Step 2: Convert to fraction form
    238.81/329.47 = 140.55/x
  3. Step 3: Cross multiply
    238.81x = 329.47 × 140.55
  4. Step 4: Simplify right side
    238.81x = 46,307.01
  5. Step 5: Solve for x
    x = 46,307.01/238.81
  6. Step 6: Final answer
    x = 193.91

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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.