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Finding the Fourth Proportional to 243.18, 336.97 and 240.21

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Solution

The fourth proportional to 243.18, 336.97 and 240.21 is: 332.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.18 : 336.97 = 240.21 : x
  2. Step 2: Convert to fraction form
    243.18/336.97 = 240.21/x
  3. Step 3: Cross multiply
    243.18x = 336.97 × 240.21
  4. Step 4: Simplify right side
    243.18x = 80,943.56
  5. Step 5: Solve for x
    x = 80,943.56/243.18
  6. Step 6: Final answer
    x = 332.85

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.