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Finding the Fourth Proportional to 528.80, 791.52 and 366.72

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Solution

The fourth proportional to 528.80, 791.52 and 366.72 is: 548.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.80 : 791.52 = 366.72 : x
  2. Step 2: Convert to fraction form
    528.80/791.52 = 366.72/x
  3. Step 3: Cross multiply
    528.80x = 791.52 × 366.72
  4. Step 4: Simplify right side
    528.80x = 290,266.21
  5. Step 5: Solve for x
    x = 290,266.21/528.80
  6. Step 6: Final answer
    x = 548.91

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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.