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Finding the Fourth Proportional to 185.82, 256.36 and 115.81

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Solution

The fourth proportional to 185.82, 256.36 and 115.81 is: 159.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.82 : 256.36 = 115.81 : x
  2. Step 2: Convert to fraction form
    185.82/256.36 = 115.81/x
  3. Step 3: Cross multiply
    185.82x = 256.36 × 115.81
  4. Step 4: Simplify right side
    185.82x = 29,689.05
  5. Step 5: Solve for x
    x = 29,689.05/185.82
  6. Step 6: Final answer
    x = 159.77

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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.