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Finding the Fourth Proportional to 643.34, 964.78 and 232.38

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Solution

The fourth proportional to 643.34, 964.78 and 232.38 is: 348.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.34 : 964.78 = 232.38 : x
  2. Step 2: Convert to fraction form
    643.34/964.78 = 232.38/x
  3. Step 3: Cross multiply
    643.34x = 964.78 × 232.38
  4. Step 4: Simplify right side
    643.34x = 224,195.00
  5. Step 5: Solve for x
    x = 224,195.00/643.34
  6. Step 6: Final answer
    x = 348.48

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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.