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Finding the Fourth Proportional to 352.26, 486.22 and 212.40

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Solution

The fourth proportional to 352.26, 486.22 and 212.40 is: 293.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.26 : 486.22 = 212.40 : x
  2. Step 2: Convert to fraction form
    352.26/486.22 = 212.40/x
  3. Step 3: Cross multiply
    352.26x = 486.22 × 212.40
  4. Step 4: Simplify right side
    352.26x = 103,273.13
  5. Step 5: Solve for x
    x = 103,273.13/352.26
  6. Step 6: Final answer
    x = 293.17

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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.