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Finding the Fourth Proportional to 263.77, 397.51 and 251.42

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Solution

The fourth proportional to 263.77, 397.51 and 251.42 is: 378.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.77 : 397.51 = 251.42 : x
  2. Step 2: Convert to fraction form
    263.77/397.51 = 251.42/x
  3. Step 3: Cross multiply
    263.77x = 397.51 × 251.42
  4. Step 4: Simplify right side
    263.77x = 99,939.35
  5. Step 5: Solve for x
    x = 99,939.35/263.77
  6. Step 6: Final answer
    x = 378.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.