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Finding the Fourth Proportional to 643.74, 965.24 and 232.80

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Solution

The fourth proportional to 643.74, 965.24 and 232.80 is: 349.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.74 : 965.24 = 232.80 : x
  2. Step 2: Convert to fraction form
    643.74/965.24 = 232.80/x
  3. Step 3: Cross multiply
    643.74x = 965.24 × 232.80
  4. Step 4: Simplify right side
    643.74x = 224,707.87
  5. Step 5: Solve for x
    x = 224,707.87/643.74
  6. Step 6: Final answer
    x = 349.07

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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.