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Finding the Fourth Proportional to 352.42, 486.69 and 242.17

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Solution

The fourth proportional to 352.42, 486.69 and 242.17 is: 334.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.42 : 486.69 = 242.17 : x
  2. Step 2: Convert to fraction form
    352.42/486.69 = 242.17/x
  3. Step 3: Cross multiply
    352.42x = 486.69 × 242.17
  4. Step 4: Simplify right side
    352.42x = 117,861.72
  5. Step 5: Solve for x
    x = 117,861.72/352.42
  6. Step 6: Final answer
    x = 334.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.