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Finding the Fourth Proportional to 263.89, 395.83 and 90.60

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Solution

The fourth proportional to 263.89, 395.83 and 90.60 is: 135.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.89 : 395.83 = 90.60 : x
  2. Step 2: Convert to fraction form
    263.89/395.83 = 90.60/x
  3. Step 3: Cross multiply
    263.89x = 395.83 × 90.60
  4. Step 4: Simplify right side
    263.89x = 35,860.22
  5. Step 5: Solve for x
    x = 35,860.22/263.89
  6. Step 6: Final answer
    x = 135.89

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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.