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Finding the Fourth Proportional to 263.78, 363.98 and 153.23

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Solution

The fourth proportional to 263.78, 363.98 and 153.23 is: 211.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.78 : 363.98 = 153.23 : x
  2. Step 2: Convert to fraction form
    263.78/363.98 = 153.23/x
  3. Step 3: Cross multiply
    263.78x = 363.98 × 153.23
  4. Step 4: Simplify right side
    263.78x = 55,772.66
  5. Step 5: Solve for x
    x = 55,772.66/263.78
  6. Step 6: Final answer
    x = 211.44

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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.