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Finding the Fourth Proportional to 643.52, 965.44 and 354.96

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Solution

The fourth proportional to 643.52, 965.44 and 354.96 is: 532.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.52 : 965.44 = 354.96 : x
  2. Step 2: Convert to fraction form
    643.52/965.44 = 354.96/x
  3. Step 3: Cross multiply
    643.52x = 965.44 × 354.96
  4. Step 4: Simplify right side
    643.52x = 342,692.58
  5. Step 5: Solve for x
    x = 342,692.58/643.52
  6. Step 6: Final answer
    x = 532.53

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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.