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Finding the Fourth Proportional to 212.06, 292.21 and 167.99

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Solution

The fourth proportional to 212.06, 292.21 and 167.99 is: 231.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.06 : 292.21 = 167.99 : x
  2. Step 2: Convert to fraction form
    212.06/292.21 = 167.99/x
  3. Step 3: Cross multiply
    212.06x = 292.21 × 167.99
  4. Step 4: Simplify right side
    212.06x = 49,086.48
  5. Step 5: Solve for x
    x = 49,086.48/212.06
  6. Step 6: Final answer
    x = 231.47

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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.