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Finding the Fourth Proportional to 253.45, 380.49 and 185.41

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Solution

The fourth proportional to 253.45, 380.49 and 185.41 is: 278.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.45 : 380.49 = 185.41 : x
  2. Step 2: Convert to fraction form
    253.45/380.49 = 185.41/x
  3. Step 3: Cross multiply
    253.45x = 380.49 × 185.41
  4. Step 4: Simplify right side
    253.45x = 70,546.65
  5. Step 5: Solve for x
    x = 70,546.65/253.45
  6. Step 6: Final answer
    x = 278.35

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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.