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Finding the Fourth Proportional to 528.28, 791.28 and 403.49

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Solution

The fourth proportional to 528.28, 791.28 and 403.49 is: 604.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.28 : 791.28 = 403.49 : x
  2. Step 2: Convert to fraction form
    528.28/791.28 = 403.49/x
  3. Step 3: Cross multiply
    528.28x = 791.28 × 403.49
  4. Step 4: Simplify right side
    528.28x = 319,275.55
  5. Step 5: Solve for x
    x = 319,275.55/528.28
  6. Step 6: Final answer
    x = 604.37

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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.