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Finding the Fourth Proportional to 260.75, 359.64 and 155.86

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Solution

The fourth proportional to 260.75, 359.64 and 155.86 is: 214.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.75 : 359.64 = 155.86 : x
  2. Step 2: Convert to fraction form
    260.75/359.64 = 155.86/x
  3. Step 3: Cross multiply
    260.75x = 359.64 × 155.86
  4. Step 4: Simplify right side
    260.75x = 56,052.59
  5. Step 5: Solve for x
    x = 56,052.59/260.75
  6. Step 6: Final answer
    x = 214.96

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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.