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Finding the Fourth Proportional to 263.82, 395.44 and 90.33

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Solution

The fourth proportional to 263.82, 395.44 and 90.33 is: 135.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.82 : 395.44 = 90.33 : x
  2. Step 2: Convert to fraction form
    263.82/395.44 = 90.33/x
  3. Step 3: Cross multiply
    263.82x = 395.44 × 90.33
  4. Step 4: Simplify right side
    263.82x = 35,720.10
  5. Step 5: Solve for x
    x = 35,720.10/263.82
  6. Step 6: Final answer
    x = 135.40

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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.