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Finding the Fourth Proportional to 254.34, 380.72 and 166.98

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Solution

The fourth proportional to 254.34, 380.72 and 166.98 is: 249.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.34 : 380.72 = 166.98 : x
  2. Step 2: Convert to fraction form
    254.34/380.72 = 166.98/x
  3. Step 3: Cross multiply
    254.34x = 380.72 × 166.98
  4. Step 4: Simplify right side
    254.34x = 63,571.79
  5. Step 5: Solve for x
    x = 63,571.79/254.34
  6. Step 6: Final answer
    x = 249.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.