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Finding the Fourth Proportional to 352.08, 485.92 and 212.21

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Solution

The fourth proportional to 352.08, 485.92 and 212.21 is: 292.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.08 : 485.92 = 212.21 : x
  2. Step 2: Convert to fraction form
    352.08/485.92 = 212.21/x
  3. Step 3: Cross multiply
    352.08x = 485.92 × 212.21
  4. Step 4: Simplify right side
    352.08x = 103,116.65
  5. Step 5: Solve for x
    x = 103,116.65/352.08
  6. Step 6: Final answer
    x = 292.87

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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.