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Finding the Fourth Proportional to 253.32, 380.22 and 161.76

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Solution

The fourth proportional to 253.32, 380.22 and 161.76 is: 242.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.32 : 380.22 = 161.76 : x
  2. Step 2: Convert to fraction form
    253.32/380.22 = 161.76/x
  3. Step 3: Cross multiply
    253.32x = 380.22 × 161.76
  4. Step 4: Simplify right side
    253.32x = 61,504.39
  5. Step 5: Solve for x
    x = 61,504.39/253.32
  6. Step 6: Final answer
    x = 242.79

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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.