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Finding the Fourth Proportional to 243, 364.25 and 223.76

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Solution

The fourth proportional to 243, 364.25 and 223.76 is: 335.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    243 : 364.25 = 223.76 : x
  2. Step 2: Convert to fraction form
    243/364.25 = 223.76/x
  3. Step 3: Cross multiply
    243x = 364.25 × 223.76
  4. Step 4: Simplify right side
    243x = 81,506.05
  5. Step 5: Solve for x
    x = 81,506.05/243
  6. Step 6: Final answer
    x = 335.42

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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.