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Finding the Fourth Proportional to 643.45, 965.49 and 232.60

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Solution

The fourth proportional to 643.45, 965.49 and 232.60 is: 349.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.45 : 965.49 = 232.60 : x
  2. Step 2: Convert to fraction form
    643.45/965.49 = 232.60/x
  3. Step 3: Cross multiply
    643.45x = 965.49 × 232.60
  4. Step 4: Simplify right side
    643.45x = 224,572.97
  5. Step 5: Solve for x
    x = 224,572.97/643.45
  6. Step 6: Final answer
    x = 349.01

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Double scale
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Similar ratio
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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.