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Finding the Fourth Proportional to 243.53, 364.79 and 113.65

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Solution

The fourth proportional to 243.53, 364.79 and 113.65 is: 170.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.53 : 364.79 = 113.65 : x
  2. Step 2: Convert to fraction form
    243.53/364.79 = 113.65/x
  3. Step 3: Cross multiply
    243.53x = 364.79 × 113.65
  4. Step 4: Simplify right side
    243.53x = 41,456.56
  5. Step 5: Solve for x
    x = 41,456.56/243.53
  6. Step 6: Final answer
    x = 170.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.