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Finding the Fourth Proportional to 528.39, 791.91 and 354.80

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Solution

The fourth proportional to 528.39, 791.91 and 354.80 is: 531.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.39 : 791.91 = 354.80 : x
  2. Step 2: Convert to fraction form
    528.39/791.91 = 354.80/x
  3. Step 3: Cross multiply
    528.39x = 791.91 × 354.80
  4. Step 4: Simplify right side
    528.39x = 280,970.32
  5. Step 5: Solve for x
    x = 280,970.32/528.39
  6. Step 6: Final answer
    x = 531.74

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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.