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Finding the Fourth Proportional to 291.43, 436.40 and 161.29

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Solution

The fourth proportional to 291.43, 436.40 and 161.29 is: 241.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.43 : 436.40 = 161.29 : x
  2. Step 2: Convert to fraction form
    291.43/436.40 = 161.29/x
  3. Step 3: Cross multiply
    291.43x = 436.40 × 161.29
  4. Step 4: Simplify right side
    291.43x = 70,384.85
  5. Step 5: Solve for x
    x = 70,384.85/291.43
  6. Step 6: Final answer
    x = 241.51

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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.