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Finding the Fourth Proportional to 365.54, 548.31 and 91.63

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Solution

The fourth proportional to 365.54, 548.31 and 91.63 is: 137.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.54 : 548.31 = 91.63 : x
  2. Step 2: Convert to fraction form
    365.54/548.31 = 91.63/x
  3. Step 3: Cross multiply
    365.54x = 548.31 × 91.63
  4. Step 4: Simplify right side
    365.54x = 50,238.45
  5. Step 5: Solve for x
    x = 50,238.45/365.54
  6. Step 6: Final answer
    x = 137.44

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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.