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Finding the Fourth Proportional to 211.49, 290.89 and 169.96

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Solution

The fourth proportional to 211.49, 290.89 and 169.96 is: 233.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.49 : 290.89 = 169.96 : x
  2. Step 2: Convert to fraction form
    211.49/290.89 = 169.96/x
  3. Step 3: Cross multiply
    211.49x = 290.89 × 169.96
  4. Step 4: Simplify right side
    211.49x = 49,438.51
  5. Step 5: Solve for x
    x = 49,438.51/211.49
  6. Step 6: Final answer
    x = 233.76

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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.