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Finding the Fourth Proportional to 154.75, 213.96 and 147.95

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Solution

The fourth proportional to 154.75, 213.96 and 147.95 is: 204.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.75 : 213.96 = 147.95 : x
  2. Step 2: Convert to fraction form
    154.75/213.96 = 147.95/x
  3. Step 3: Cross multiply
    154.75x = 213.96 × 147.95
  4. Step 4: Simplify right side
    154.75x = 31,655.38
  5. Step 5: Solve for x
    x = 31,655.38/154.75
  6. Step 6: Final answer
    x = 204.56

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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.