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Finding the Fourth Proportional to 185.97, 256.62 and 154.19

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Solution

The fourth proportional to 185.97, 256.62 and 154.19 is: 212.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.97 : 256.62 = 154.19 : x
  2. Step 2: Convert to fraction form
    185.97/256.62 = 154.19/x
  3. Step 3: Cross multiply
    185.97x = 256.62 × 154.19
  4. Step 4: Simplify right side
    185.97x = 39,566.95
  5. Step 5: Solve for x
    x = 39,566.95/185.97
  6. Step 6: Final answer
    x = 212.76

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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.