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Finding the Fourth Proportional to 253.56, 379.26 and 251.40

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Solution

The fourth proportional to 253.56, 379.26 and 251.40 is: 376.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.56 : 379.26 = 251.40 : x
  2. Step 2: Convert to fraction form
    253.56/379.26 = 251.40/x
  3. Step 3: Cross multiply
    253.56x = 379.26 × 251.40
  4. Step 4: Simplify right side
    253.56x = 95,345.96
  5. Step 5: Solve for x
    x = 95,345.96/253.56
  6. Step 6: Final answer
    x = 376.03

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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.