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Finding the Fourth Proportional to 243.62, 333.21 and 239.84

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Solution

The fourth proportional to 243.62, 333.21 and 239.84 is: 328.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.62 : 333.21 = 239.84 : x
  2. Step 2: Convert to fraction form
    243.62/333.21 = 239.84/x
  3. Step 3: Cross multiply
    243.62x = 333.21 × 239.84
  4. Step 4: Simplify right side
    243.62x = 79,915.42
  5. Step 5: Solve for x
    x = 79,915.42/243.62
  6. Step 6: Final answer
    x = 328.04

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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.