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Finding the Fourth Proportional to 263.55, 363.53 and 213.78

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Solution

The fourth proportional to 263.55, 363.53 and 213.78 is: 294.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.55 : 363.53 = 213.78 : x
  2. Step 2: Convert to fraction form
    263.55/363.53 = 213.78/x
  3. Step 3: Cross multiply
    263.55x = 363.53 × 213.78
  4. Step 4: Simplify right side
    263.55x = 77,715.44
  5. Step 5: Solve for x
    x = 77,715.44/263.55
  6. Step 6: Final answer
    x = 294.88

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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.