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Finding the Fourth Proportional to 243.97, 336.69 and 145.73

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Solution

The fourth proportional to 243.97, 336.69 and 145.73 is: 201.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.97 : 336.69 = 145.73 : x
  2. Step 2: Convert to fraction form
    243.97/336.69 = 145.73/x
  3. Step 3: Cross multiply
    243.97x = 336.69 × 145.73
  4. Step 4: Simplify right side
    243.97x = 49,065.83
  5. Step 5: Solve for x
    x = 49,065.83/243.97
  6. Step 6: Final answer
    x = 201.12

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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.