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Finding the Fourth Proportional to 243.92, 336.60 and 145.72

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Solution

The fourth proportional to 243.92, 336.60 and 145.72 is: 201.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.92 : 336.60 = 145.72 : x
  2. Step 2: Convert to fraction form
    243.92/336.60 = 145.72/x
  3. Step 3: Cross multiply
    243.92x = 336.60 × 145.72
  4. Step 4: Simplify right side
    243.92x = 49,049.35
  5. Step 5: Solve for x
    x = 49,049.35/243.92
  6. Step 6: Final answer
    x = 201.09

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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.