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Finding the Fourth Proportional to 260.21, 359.03 and 161.90

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Solution

The fourth proportional to 260.21, 359.03 and 161.90 is: 223.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.21 : 359.03 = 161.90 : x
  2. Step 2: Convert to fraction form
    260.21/359.03 = 161.90/x
  3. Step 3: Cross multiply
    260.21x = 359.03 × 161.90
  4. Step 4: Simplify right side
    260.21x = 58,126.91
  5. Step 5: Solve for x
    x = 58,126.91/260.21
  6. Step 6: Final answer
    x = 223.38

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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.