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Finding the Fourth Proportional to 242.46, 333.25 and 217.28

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Solution

The fourth proportional to 242.46, 333.25 and 217.28 is: 298.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.46 : 333.25 = 217.28 : x
  2. Step 2: Convert to fraction form
    242.46/333.25 = 217.28/x
  3. Step 3: Cross multiply
    242.46x = 333.25 × 217.28
  4. Step 4: Simplify right side
    242.46x = 72,408.85
  5. Step 5: Solve for x
    x = 72,408.85/242.46
  6. Step 6: Final answer
    x = 298.64

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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.