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Finding the Fourth Proportional to 263.89, 395.81 and 90.52

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Solution

The fourth proportional to 263.89, 395.81 and 90.52 is: 135.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.89 : 395.81 = 90.52 : x
  2. Step 2: Convert to fraction form
    263.89/395.81 = 90.52/x
  3. Step 3: Cross multiply
    263.89x = 395.81 × 90.52
  4. Step 4: Simplify right side
    263.89x = 35,826.29
  5. Step 5: Solve for x
    x = 35,826.29/263.89
  6. Step 6: Final answer
    x = 135.76

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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.