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Finding the Fourth Proportional to 260.75, 359.88 and 157.31

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Solution

The fourth proportional to 260.75, 359.88 and 157.31 is: 217.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.75 : 359.88 = 157.31 : x
  2. Step 2: Convert to fraction form
    260.75/359.88 = 157.31/x
  3. Step 3: Cross multiply
    260.75x = 359.88 × 157.31
  4. Step 4: Simplify right side
    260.75x = 56,611.94
  5. Step 5: Solve for x
    x = 56,611.94/260.75
  6. Step 6: Final answer
    x = 217.11

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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.