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Finding the Fourth Proportional to 211.49, 291.94 and 149.37

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Solution

The fourth proportional to 211.49, 291.94 and 149.37 is: 206.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.49 : 291.94 = 149.37 : x
  2. Step 2: Convert to fraction form
    211.49/291.94 = 149.37/x
  3. Step 3: Cross multiply
    211.49x = 291.94 × 149.37
  4. Step 4: Simplify right side
    211.49x = 43,605.62
  5. Step 5: Solve for x
    x = 43,605.62/211.49
  6. Step 6: Final answer
    x = 206.19

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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.