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Finding the Fourth Proportional to 263.72, 363.78 and 165.31

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Solution

The fourth proportional to 263.72, 363.78 and 165.31 is: 228.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.72 : 363.78 = 165.31 : x
  2. Step 2: Convert to fraction form
    263.72/363.78 = 165.31/x
  3. Step 3: Cross multiply
    263.72x = 363.78 × 165.31
  4. Step 4: Simplify right side
    263.72x = 60,136.47
  5. Step 5: Solve for x
    x = 60,136.47/263.72
  6. Step 6: Final answer
    x = 228.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.