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Finding the Fourth Proportional to 185.97, 256.61 and 120.47

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Solution

The fourth proportional to 185.97, 256.61 and 120.47 is: 166.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.97 : 256.61 = 120.47 : x
  2. Step 2: Convert to fraction form
    185.97/256.61 = 120.47/x
  3. Step 3: Cross multiply
    185.97x = 256.61 × 120.47
  4. Step 4: Simplify right side
    185.97x = 30,914.75
  5. Step 5: Solve for x
    x = 30,914.75/185.97
  6. Step 6: Final answer
    x = 166.24

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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.