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Finding the Fourth Proportional to 243.69, 333.87 and 240.66

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Solution

The fourth proportional to 243.69, 333.87 and 240.66 is: 329.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.69 : 333.87 = 240.66 : x
  2. Step 2: Convert to fraction form
    243.69/333.87 = 240.66/x
  3. Step 3: Cross multiply
    243.69x = 333.87 × 240.66
  4. Step 4: Simplify right side
    243.69x = 80,349.15
  5. Step 5: Solve for x
    x = 80,349.15/243.69
  6. Step 6: Final answer
    x = 329.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.