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Finding the Fourth Proportional to 253.85, 378.55 and 251.54

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Solution

The fourth proportional to 253.85, 378.55 and 251.54 is: 375.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.85 : 378.55 = 251.54 : x
  2. Step 2: Convert to fraction form
    253.85/378.55 = 251.54/x
  3. Step 3: Cross multiply
    253.85x = 378.55 × 251.54
  4. Step 4: Simplify right side
    253.85x = 95,221.41
  5. Step 5: Solve for x
    x = 95,221.41/253.85
  6. Step 6: Final answer
    x = 375.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.