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Finding the Fourth Proportional to 643.30, 964.40 and 232.71

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Solution

The fourth proportional to 643.30, 964.40 and 232.71 is: 348.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.30 : 964.40 = 232.71 : x
  2. Step 2: Convert to fraction form
    643.30/964.40 = 232.71/x
  3. Step 3: Cross multiply
    643.30x = 964.40 × 232.71
  4. Step 4: Simplify right side
    643.30x = 224,425.52
  5. Step 5: Solve for x
    x = 224,425.52/643.30
  6. Step 6: Final answer
    x = 348.87

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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.