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Finding the Fourth Proportional to 185.94, 256.26 and 154.86

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Solution

The fourth proportional to 185.94, 256.26 and 154.86 is: 213.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.94 : 256.26 = 154.86 : x
  2. Step 2: Convert to fraction form
    185.94/256.26 = 154.86/x
  3. Step 3: Cross multiply
    185.94x = 256.26 × 154.86
  4. Step 4: Simplify right side
    185.94x = 39,684.42
  5. Step 5: Solve for x
    x = 39,684.42/185.94
  6. Step 6: Final answer
    x = 213.43

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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.