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Finding the Fourth Proportional to 528.45, 791.91 and 203.43

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Solution

The fourth proportional to 528.45, 791.91 and 203.43 is: 304.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.45 : 791.91 = 203.43 : x
  2. Step 2: Convert to fraction form
    528.45/791.91 = 203.43/x
  3. Step 3: Cross multiply
    528.45x = 791.91 × 203.43
  4. Step 4: Simplify right side
    528.45x = 161,098.25
  5. Step 5: Solve for x
    x = 161,098.25/528.45
  6. Step 6: Final answer
    x = 304.85

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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.