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Finding the Fourth Proportional to 212.10, 292.22 and 173.22

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Solution

The fourth proportional to 212.10, 292.22 and 173.22 is: 238.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.10 : 292.22 = 173.22 : x
  2. Step 2: Convert to fraction form
    212.10/292.22 = 173.22/x
  3. Step 3: Cross multiply
    212.10x = 292.22 × 173.22
  4. Step 4: Simplify right side
    212.10x = 50,618.35
  5. Step 5: Solve for x
    x = 50,618.35/212.10
  6. Step 6: Final answer
    x = 238.65

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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.