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Finding the Fourth Proportional to 253.86, 379.98 and 251.43

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Solution

The fourth proportional to 253.86, 379.98 and 251.43 is: 376.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.86 : 379.98 = 251.43 : x
  2. Step 2: Convert to fraction form
    253.86/379.98 = 251.43/x
  3. Step 3: Cross multiply
    253.86x = 379.98 × 251.43
  4. Step 4: Simplify right side
    253.86x = 95,538.37
  5. Step 5: Solve for x
    x = 95,538.37/253.86
  6. Step 6: Final answer
    x = 376.34

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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.