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Finding the Fourth Proportional to 203.54, 304.85 and 145.82

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Solution

The fourth proportional to 203.54, 304.85 and 145.82 is: 218.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.54 : 304.85 = 145.82 : x
  2. Step 2: Convert to fraction form
    203.54/304.85 = 145.82/x
  3. Step 3: Cross multiply
    203.54x = 304.85 × 145.82
  4. Step 4: Simplify right side
    203.54x = 44,453.26
  5. Step 5: Solve for x
    x = 44,453.26/203.54
  6. Step 6: Final answer
    x = 218.41

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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.