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Finding the Fourth Proportional to 365.75, 548.69 and 203.61

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Solution

The fourth proportional to 365.75, 548.69 and 203.61 is: 305.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.75 : 548.69 = 203.61 : x
  2. Step 2: Convert to fraction form
    365.75/548.69 = 203.61/x
  3. Step 3: Cross multiply
    365.75x = 548.69 × 203.61
  4. Step 4: Simplify right side
    365.75x = 111,718.77
  5. Step 5: Solve for x
    x = 111,718.77/365.75
  6. Step 6: Final answer
    x = 305.45

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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.