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Finding the Fourth Proportional to 643.52, 965.34 and 232.76

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Solution

The fourth proportional to 643.52, 965.34 and 232.76 is: 349.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.52 : 965.34 = 232.76 : x
  2. Step 2: Convert to fraction form
    643.52/965.34 = 232.76/x
  3. Step 3: Cross multiply
    643.52x = 965.34 × 232.76
  4. Step 4: Simplify right side
    643.52x = 224,692.54
  5. Step 5: Solve for x
    x = 224,692.54/643.52
  6. Step 6: Final answer
    x = 349.16

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1.5x scale

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.