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Finding the Fourth Proportional to 291.63, 436.89 and 161.49

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Solution

The fourth proportional to 291.63, 436.89 and 161.49 is: 241.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.63 : 436.89 = 161.49 : x
  2. Step 2: Convert to fraction form
    291.63/436.89 = 161.49/x
  3. Step 3: Cross multiply
    291.63x = 436.89 × 161.49
  4. Step 4: Simplify right side
    291.63x = 70,553.37
  5. Step 5: Solve for x
    x = 70,553.37/291.63
  6. Step 6: Final answer
    x = 241.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.