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Finding the Fourth Proportional to 185.80, 256.43 and 154.67

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Solution

The fourth proportional to 185.80, 256.43 and 154.67 is: 213.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.80 : 256.43 = 154.67 : x
  2. Step 2: Convert to fraction form
    185.80/256.43 = 154.67/x
  3. Step 3: Cross multiply
    185.80x = 256.43 × 154.67
  4. Step 4: Simplify right side
    185.80x = 39,662.03
  5. Step 5: Solve for x
    x = 39,662.03/185.80
  6. Step 6: Final answer
    x = 213.47

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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.