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Finding the Fourth Proportional to 352.88, 486.89 and 306.17

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Solution

The fourth proportional to 352.88, 486.89 and 306.17 is: 422.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.88 : 486.89 = 306.17 : x
  2. Step 2: Convert to fraction form
    352.88/486.89 = 306.17/x
  3. Step 3: Cross multiply
    352.88x = 486.89 × 306.17
  4. Step 4: Simplify right side
    352.88x = 149,071.11
  5. Step 5: Solve for x
    x = 149,071.11/352.88
  6. Step 6: Final answer
    x = 422.44

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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.